Since the Vita, unlike its main competitor, is awesome in that it allows you to play games from different regions almost indiscriminately, I've been importing more since I got mine.
Tuesday I picked up Girls und Panzer: Senshado, Kiwamemasu! and Time Travelers. I haven't started Time Travelers yet, but Girls und Panzer is surprisingly good. The story pretty much follows the anime perfectly, which makes it easier for me to keep track of whats happening, and to properly care about and relate to the characters. The story mode gameplay at first I was worried about being to linear, but it's actually great. It follows the action from the anime very closely, without being too restricting. So, if I feel like it, I can go Rambo and kill everyone at a part where I just need to reach a certain point. Enemies are impossible to completely eliminate until you reach a point in the story where they actually do get eliminated, but this doesn't take away from the game at all.
The story mode can be beaten in a few hours, but it can be played from every friendly tank's perspective (and it is VERY different for each one, they all play very differently, have different objectives, and some are even very tricky to progress with since they're defeated in the anime). There's also free play and challenge mode, where you can use any tanks you've come across during the game. There are technically 50 different tanks, but 10 of them are just different skins for starting tanks with no difference in stats. Overall, it's a very meaty, exciting game, and very import-friendly. Definitely something you should all pick up if you're ever buying from Play-Asia.