For me, definitely a 2-door, convertible, lots of power, superb handling, driving with the ESP or DSC off, all options and a head-turner. Examples like a common 911, SL, SLK, Z3 or 4, not to mention other top far-reaching budget like Ferraris, etc.
If four-doors, M5, CLS, E500, LS, C320s.
Cars must be factory-standard specs., definitely not those common heavily modified cars you see on the roads.
Toyota Celica, old one of my uncle.