Since nobody's posted here for two days just about, I get to make two questions!
Who is your favorite Stage 6 boss?
Basically, what stage 6 boss do you like the most in the series. Self-explanatory. For PoFV it's Stage 9 and for PoDD I don't know. For GFW it's the Three Mischievous Fairies, for StB I think Momiji was the last character, Hatate for DS.
Who is your favorite Extra Stage boss?
Same as above but with extra bosses.
These have likely already been asked but I'm too lazy to dig through a thread that's got more than five pages of content.
My favorite Stage 6 boss is Yuuka Kazami because she's fun as hell but are also as refined as can be. Yuuka is the hardest fight in the series hands-down, both 5 and 6.
Honorable mentions are Shinki, Yuyuko, Eirin, and Kanako for being awesome in your own ways.
My favorite Extra boss is Suwako Moriya because even though I have the most experience with her cards, they never got boring because some always fuck me up like a ragdoll, the ones being Red Frog of Houei Era 4, Froggy Braves the Elements, and Suwa War, and some are just plain fun, like Party Start for having a good pattern and looking awesome. It looks like someone's dancing and throwing confetti (Deadly confetti) at people and having a good time.
Honorable mentions are Koishi for the extreme abstractness of her spells, ExAlice for being stolen from by Sanae her fun yet simple attacks, and Gengetsu for having the most unfitting Extra Boss theme ever (Seriously, Crescent Dream does NOT sound like Extra stage music, I thought her theme was Magic Shop of Raspberry at first!)