I love my Vita. I'm so excited that so many awesome looking games are coming out for it this year. I enjoy the Vita so much more than the 3DS (though I do own more games for my 3DS at the moment), I just find it to be a much more enjoyable handheld.
Right now I only own Ys: Memories of Celceta, Final Fantasy X/X-2 HD and the first season of The Walking Dead for my Vita. However, I am getting Demon Gaze (releases next week) and Disgaea 4: A Promise Revisited for it this year. Perhaps more, there's still some games I have to look into.
There is also a list of Vita games that I'm going to go back and purchase: Disgaea 3: Absence of Detention, Muramasa Rebirth, Soul Sacrifice, and Persona 4 Golden are the only ones that I can remember off the top of my head.
I look to increase my Vita collection by a very large amount in the next year.