Xemnas: expected him to be tough, but surprisingly a one-shot, but still a very good fight
Xigbar: also surprisingly a one-shot, but I've figured out blocking so that's basically what I did
Xaldin: the Problem Child, I lost count of how many tries he took, which is probably partly because in the main story Mickey saved me three times during that fight which means I didn't necessarily learn it back then, but eventually I got him down---
Vexen: one-shot, relatively straightforward, use fire and try to stay out of the thing on the ground
Lexaeus: tough until I looked up what I was even supposed to be doing, and then he was reasonable
Zexion: one-shot, though he definitely made a nuisance of himself with his illusions and such, though I did find the word search to be cute
Saix: actually reasonable, a two-shot
Axel: I do not know how to get him to do the reaction that gets rid of the fire on the ground, but eventually (after several tries) I got lucky. The one I had the second most trouble with after Xaldin.
Demyx: lives up to his infamy, but once I gave Goofy some ethers it went okay
Luxord: only took two tries because I kept messing up the minigames
Marluxia: expected him to be a problem child but actually only took three tries; I think this is because he gave me so much trouble with his Absent Silhouette so I was forced to learn the fight (and how to reflect spam)
Larxene: one-shot, surprisingly reasonable
Roxas: expected him to be a problem child but actually a one-shot; the problem I had with his fight during the story was a need to go level drive forms, so maybe that (and learning reflect spam) helped? idk
but all in all very good boss fights ^^
(I fully expect Lingering Will to kick my ass for a while, but I intend to fight him fair and prove myself to him---)
oh man, Xaldin's always the problem child, I hate fighting him every time sdfkjg