Freedom Wars, Oreshika, Phantasy Star Nova, Digimon and obviously Gravity Rush are the biggies on the list for me.
I really think sony could build their base in the west if they get the timing of these localisations right! Also they need to bundle/promote these japanese games WHEN they come over here, probably adopt a quirky advertising campaign too... whilst they're at it they should release those other PSVita colours.
I could imagine it now: Lime green Vita bundled with Minecraft and Freedom Wars!!