Marth: Bland, white bread, but overall inoffensive. I don't like his design and don't care for him at all, but I give him a pass since he was the first and he was sa nice character by the time period in which he was released.
Alm: What are his struggles and his failings? I think they could had done more with Alm in his remake
Celica: She has a great design and is the only lord that address the religiously of historical people, which is often ignored in historical fantasy, understandably. That said, she is annoying, I understand what they were doing with her but she felt flat when they portrayed Alm as the righteous lord that can't do no wrong, and saved her. Celica needed to die to learn from her mistakes, which is cheap and often bad writing. Why they did that? If she was kept dead she would be the first tragic heroine, but idk if it would help Celica's case in charisma, but she would at least be unique.
Sigurd: He is iconic because he is the first tragic hero, and the better one at that. He is portrayed as the average naive hero and faces realistic consequences to that. I roll eyes to his romance with Deirdre but I like his character arc, and it had proper consequences instead of the plot bending itself to make him correct.
Seliph: I like him, I can't put my finger why. But he has way less characterisation than Sigurd and at first he can look like a generic hero. His tibits of characterisation like his imposter syndrome and his fears are hidden in random supports, which are easily missable.
Leif: I didn't pay Leif any mind when playing his game, because that game has less characterisation than Genealogy. But he is the only few lords that was really failing in his mission, which is a very interesting concept. He leads a group of misfits which is quite cool. It just falls flat when you realise that he is a prince by birth and had special blood, but his arc is better done than Alm since he doesn't have an "enlightning cliche moment", he is just a guy put in a life and death situation and needs to survive through that with even less support than Seliph.
Roy: I like him. Like Seliph, his characterisation is missable because of the scrappy supports mechanic. He is the first scholar lord, he doubts himself a lot and is aware that he is not more special than anyone else, he got depressed during the war... He is not the most unique lord, but people exagerated in his blandness. He has more going on than Marth, and his father.
Eliwood: Diet version of his son Roy. He is redheaded Marth and a the blandest of the trio, but an overall alright character. He had an advantage over Roy, that he had other two interesting main characters to interact with during the game 'scenes', but as a character and hero he is a bit unremarkable imo.
Lyndis: She is Sue's Expy aka she is Sue if she were a lord, but I prefer Sue even if she is a side character... That said, I like Lyn. She has a proper background that differs from other lords, a proper unique personality instead of being another prim and proper lady. She is upbeat, lives in the wilderness, rejects her noble side... There's no other lord like her, so I don't see how she could be bland. That said, it seems they didn't know what do to with her and reduced Lyn as a waifu for Eliwood or Hector, since birthing Roy or Lilina is the only way to justify her relevance and status as lord, unfortunately.
Hector: He is a meathead, obnoxious, but he has hidden depths and is the most iconic of the trio and the first and best of his kind. I wouldn't like him much as a person but I like him as a character.
Eirika: A bit unremarkable other than being female Marth. I like Eirika's light blue hair but her design is generic and remember me of Marine/Guy for Rayearth. Other than that I find exagerated the criticism she gets from trusting Leon, I can understand why she did that, and it's ironic that some of the people that criticise Eirika's decision defend Celica and Sigurd who are way worse in this aspect, and lost their own lives duo their short sightness. Also she was overshadowed by Ephraim who is treated as more talented and righteous than her, even though I prefer her route since she has more growth than him.
Ephraim: Another male lord that overshadows the female. He is diet version of Hector but not as interesting. He has his flaws but... He really struggle with that?
Ike: The first commoner lord, which is great. I like his design and the discussion of his sexuality is amusing. I like him overall.
Micaiah: The first and only mage lord. Overshadowed by Ike... I have mixed feelings about her but she is well writen overall. Just not a lord that I care about.
Chrom: I see him as a composite character of Sigurd and Marth but more likeable than both. He is alright, another average blue haired lord.
Lucina: She is another tragic heroine since she basically failed to save her world (granted some of it was the previous generation's fault, and she was basically doomed, but still...). I like her though I find her personality a bit bland. The interesting aspect of her is when she interacts with the previous generation.
Robin: Heh... He is indeed the protagonist of Awakening. The story is his whole arc of trusting in bonds and making the right choice to defeat Grima to save the world and give a better future in this timeline. That said I think Robin would be better if it wasn't an avatar. Robin is a nice character and stands as it's own, but by being an avatar its potential is not reached. Also I need to say that I dislike female Robin's design and personality. Why did they change some of the convos between genders and made the female more unlikeable?
Kris: I like Kris as an avatar in a mechanical perspective. I couldn't care less for Kris (or Marth) as characters so I don't feel rage for the infamous stolen quotes but I completely understand why Kris is disliked by Archanea fans.
Corrin: I have mixed feelings about Corrin, I think some of the flaws of the character is duo to Fates disjointed writing than Corrin per se. Also it's crazy Corrin is criticized for things that Byleth is praised.
Byleth: ... The closest to a true avatar. Would be better if Byleth had quote options instead of being properly stoic because I have some hard time to understand why everyone like them if they act like an emotionless shell most of the time. I'm a bit tired of avatars or protagonists looking like Marth expies. Couldn't next avatars have more unique designs instead or generic blue hair guy/girl with bangs? Granted I don't mind them.
Edelgard: I like her as a character and she is a breath of fresh air. I wouldn't like her as a person though. Also another female character that is in the wrong since she is a villain in three routes. Are you seeing the pattern?
Dimitri: I like him and another breath of fresh air. His character arc is interesting but rushed.
Claude: I love him and he is one of my favourite lords. But he is wasted potential. Claude was overshadowed by the other three lords and he would be better in a game on its own since his route could easily be fullfilled by the church, and Almyra is a very unique setting that should be explored in a game on its own instead of getting lost in the middle of Fodlan stuff.