1. FE3: My favorite story and characters in the series, plus it adds in (most of) FE1, so it's the complete package.
2. FE11: Same as the above, but the avatar in 12 tipped the scales.
3. FE1: Like FE3.
4. FE12: I liked it, only ever played with the canon classes, but the support convos were a nice touch.
5. FE4: Enjoyed the vast maps, character-specific skills, and the cast is up there. Also the only game to do kids right to me.
6. FE5: It's difficult the first playthrough blind, but I liked following characters I've met before in the previous title.
*. Not going to really count, but I'd put BS around here. Voiced characters, and more of the characters I loved.
7. FE15: Echoes was a remake done right. Cutscenes looked good, everything was voiced, and added elements not found in the original Gaiden was appreciated. Not a fan of what they changed with Celica, but it is a template for what I'd like them to do to FE1/3 again someday. They played them too safe.
**. Not sure if this'd be counted, but this is where I'd place FE Musou. Story was whatever, but it had a few of my favorite characters from the series, and I sunk so many hours into it. Gameplay itself was perfect.
8. FE2: I do place Gaiden kind of high.The novelty aspect is one thing, but it's a refreshing break from the rest from time to time. Using HP with magic, shooting arrows from afar, etc. Of course, maps are the weak point of the game.
9. FE10: The game does have a special spot for me, and I actually played this story out of order. I played Radiant Dawn before Path of Radiance. Whilst Ike is a fine hero, I do prefer Micaiah as a character. Gameplay-wise, of course the Dawn Brigade is on the weaker side, but that's fine with me.
10. FE7: My first FE on the GBA having skipped 6 through sheer coincidence. Lyn is great, and it's easily one of the better stories for getting newbies into Fire Emblem. I also ended up liking Eliwood quite a bit by the end. Maps were fine, spent a ton of time dueling in arenas, and the music remixed old favorites which was nice.
11. FE13: Originally this was a game that I rather disliked to be honest. After giving it another shot thanks to a recommendation from someone I ended up changing my mind on it. Whilst it's still not my favorite, and I still don't like the avatar, there's enough here to have fun with. I actually do like the marriage system, but I'm just one for playing through the story. Getting galeforce, caring for Donnel, or taking care of the kids are things I ignore with this entry.
12. FE14: Fates is a mixed bag. I like, dislike, and feel neutral with each route respectively. Kids came back for whatever reason which I didn't care for, but could easily be ignored. The avatar in this game is worse than Awakening though. Character interactions are nice (I actually did like the face rubbing feature), but because you can pair with almost anyone, the supports suffered. The jump to S rank convos would just feel awkward in places. Maps can be great though depending on what you're playing.
13. FE9: There's nothing really wrong with the game, in fact I do enjoy it as with the prior titles mentioned, but it was pitched to me as the best in the series. The story is fine, and the gameplay almost way too easy with Ike being able to complete the game himself. It's a solid entry.
14. FE6: This is one of the only 2 FEs that I actually kinda dislike? I don't really care for Roy as a lord, and he feels so much weaker than other lords in the series. Maps weren't especially great either. This really hurts coming straight off of a stellar game like FE5. Lilina helps the game quite a bit.
15. FE8: Maps are more or less fine, but I find the story to be the worst in the series mainly because of the two lords. I do like one element with Cormag, but it's just not personally for me. I can see why people might have a difference of opinion and actually like stuff with Orson for instance however.
***. Heroes: I dropped off hard on it and sometimes just login to get my daily orbs for banner pulls. Not too interested in the game itself anymore.
(Three Houses is a work in progress, but I feel like it'll end up in the upper half of the list when all is said and done)
Never played #FE, so I really do hope it gets a Switch port.