Ok this is going to be easy... I think...
ASFXX: POWDER SNOW
LOVEppears: appears
Duty: I'm torn equally between vogue, SURREAL, and End of the World... three of my all time favorites... it's not possible to pick one over the other. XD
I am...: I am...
RAINBOW:... ugh... too hard XD ummm, Free&Easy nonono, Heartplace... gah! Can't choose! ><
Memorial Address: HANABI ~episode II~
MY STORY: Inspire
(miss) understood: Another hard one... I think, is this LOVE? slightly beats out HEAVEN.
Secret: kiss o kill
GUILTY: (don't) leave me alone
NEXT LEVEL: LOVE N HATE
Rock n Roll Circus: Don't Look Back
Misc. Tracks: Mirrorcle World, RAINBOW, and WHATEVER (version M)
... this was a lot harder than I thought... XD