Bought one because of:
-Remote play (really wanted to try that out)
-The decent amount of games that are released/ being released
-Japanese imports
-The 32gb memory card (even though it was expensive at the time) so I can play music, videos, more space for games etc.
-Cross play/ cross-buy
-When I first held one, I really wanted to buy it because of the feel of the ps vita is so comfortable for me, I love the touch screen, dual analog, etc.
-I knew right away that ps plus would give some good games for free
-I heard that the Vita could be used as a controller for the ps3 (which is true)
-Looooooooooooooooooooooove indie games lol
-I can download some games that I bought from the PS3 psn store like psp/ ps1 classics
I know there's more reasons on why I bought the ps vita, but I couldn't think of more