This is exactly my opinion and I saved some precious minutes typing this out because someone else already did. Conquest has the best gameplay in the series, Birthright is a diet coke version that I still generally enjoy despite its shortcomings, Revelation maps are the worst. Other Fire Emblem games have a subpar story as well, so it's part of the course for me in a sense, even though Fates plot is pretty awful. I like the characters and supports, that's probably where I am different from other people.
The fates routes are my most replayed FE games. The gameplay is fantastic, really enjoy the combination of pair-up, the Conquest maps with interesting terrains (and win conditions that aren't just "route the enemy") and the OST is killer. Fates is my favourite by a large margin for these reasons and no other FE game shares its gameplay finesse.