Favorite: Chapter 3.
It has my favorite map theme in the entire game and in-gameplay it's fantastic as well: you are being attacked by different squads, each one of them being formed by different types of units, with the only exceptios being the two squads of general and armor knights, and there are various pirates that will quickly burn every village if you are not fast enough, sproning you into being fast and effective if you want to save the villages.
Even after this part, It doesn't stop being fun.
Really, the only part where It bcomes a bit boring is the last part with Bridget, Claude, Tailte and the Orgahill pirates.
Least Favorite: Chapter 1:
There is such a low variety of enemies on this chapter that always makes me want to just solo it with Sigurd, especially considering that most of your enmies are axe-users; not to mention the recruitment of Ayra which is just plainly boring and bad, since there is apossibility that Ayra may kill your "bait unit" or even going for another unit.
Oh, and there is the last part where you need to traverse the forest and all of your units are penalized in movement: here is worse than in Chapter 5 because there is Jamka, who you want to recruit - the problem is you need Aideen to do and she already has shitty movements on normal terrains, so the forest just make this recruitment more difficulty than It should be.
Not to mention that, like ayra, there is the possibility that he may kill one of your units.
Oh, and I find the music of this chapter really boring and repetitive.