I've got it bad but the cars I've purchased have, until lately, been pretty similar.
I owned probably a dozen 240sx's, 4 NA6 miatas, 2 SW20 MR2's, a 2004 WRX, a Datsun 510 sedan, and some other stuff.
Lately it's branched out some:
- MX73 Cressida
- Volvo 850 GLT
- '78 Mercedes 240 Diesel
- Current '06 Mustang GT
Honestly I credit this to TCL. I was on 240/dorifto forums and so that's what I bought, and I still love those cars but now my tastes are wider ranging thanks to the myriad of nonsense that assaults my eyeballs every time I get on TCL.