RX-7s, R33s, (Hate them now, hated them in GT3, but I can't say I haven't bought at least one in each game, and they were AWESOME in GT2) MIATA, and a Prelude in GT2.
Oh, and occasionally the "Grey crappy looking thing" as was said's big brother, the Protege GT-X (Makes for a GREAT race in the sunday cup on High Speed ring)