C1 or 2, 7 or 8 for me. Didn't care for them 196 to whenever the C7 came out. I thought the C3 was the worst one. Just didn't like GM styling in the 70s (but didn't like anyone else's styling either). The '57 and fastback C2 (not as sure of the changes year over year) are probably my favorites of the oldies. Modern Corvettes are pretty slick, IMO.