I actually owned the PS Vita for a while. It was good and fun but it didn't really have any special games going for it. I played a bit of Rayman and FIFA and eventually just sold it as I stopped using it for the most part. A shame as it was quite powerful for its time.
The mainstream support for it wasn't great. But the few Sony exclusives it got were amazing games, such as Gravity Rush, Uncharted and the God of War collection.
It also had the great HD ports for Metal Gear Solid 2 and 3.
If you dig down just a couple of feet into its library, you'll see how much greatness there is in there.
The Japanese gave the console tons of support, and the amount of great indies for it is phenomenal.
You can find one for cheap nowadays and I recommend it a lot.
It got Persona 4 Golden way before the PC and that was the best way to play that game :D