Prius. I like the one I'm driving now. Pretty comfortable, enough space for me, and of course there's the gas mileage (which is pretty much the main selling point for a Prius).
Only thing that sucks about it is that it seems Toyota pretty much owns you when it comes to any repairs. Mine's higher mileage/out of warranty. I can take it to a local shop for standard maintenance like oil changes and tires and stuff, but anything more complicated than that is some specialized Prius system that apparently nobody (aside from a dealer, where it'll cost me fuck tons of money) wants to touch.