definalty quads! My first was a 1986 Suzuki 230 Quad Sport, then got a YZ250 (not as much fun) and then got a 2001 Raptor 660r. Then got a modified Polaris Scrambler 50cc 2 stroke playbike. THAT THING WAS A BLAST!!! but dangerous.
I was also big into peddle bikes. I bought and sold those like i do stereo equipment now a days