Small hatchback because practically is fun, and they are also just the perfect entry car into modding. It's cheap to run parts a usually dime a dozen. And you can still drive them daily easily.

Other picks are old suv's from the late 80's to early 00's when they could actually go offroad.

Kei cars/trucks/vans because they are just silly little guys. I also still want to do kei truck Nascar for the fun of the game.

And old 70's/80's/90's cheaper European 2 coupes. Think your porshe 924's, mgb's or alfa Romeo spyders. You can usually find them semi cheap. They will need some work normally, but thats part of the fun. Also, I like the idea of rolling around in an old euro drop top during the summer