I love the crap out of my Vita, but I think its appeal depends heavily on what you're looking for. Persona 4: Golden was enough reason for me to get it, since I'm a rabid MegaTen fan and will happily buy new versions of crap I already own, but Gravity Rush, Disgaea 3, and Zero Escape really helped reinforce my decision to buy it. I've also found that I really like how PS1 games look on it, which was kind of a nice surprise.
For other people, there probably aren't enough casual and Western-style games, so it'd be hard to recommend to anyone interested in that sort of thing. Ditto for anyone who's not interested in enhanced ports of PS2/PS3 games or cross-platform titles.
That said, in terms of sheer hardware quality, it's probably the best handheld I've ever owned. Really really slick machine.