It's not just AC3: Liberation and NFS: Most Wanted that are garnering praise on the Vita, the smaller games are also doing pretty well. PSP mini BreakQuest is picking up some impressive scores and comes with a thumping soundtrack you can get here.
PSPminis - 10/10
PSN Stores - 4/5
NoobFeed - 80/100
IndieGameMag - 92/100
John Cleese voiced Smart As... is also getting good scores
God is a Geek 8/10
So, if you're playing those big games on your main console, then you could still spare a little love for some these smaller titles.