What does and why?
I think if you ask 10 bodybuilders, you'll get 10 different answers. MY preference is guys like Flex Wheeler (1993), Levrone at his best, Shawn Ray, Bob Paris, Rory Leidelmeyer, Serge Nubret, Danny Padilla (with his 1981 O condition or 1990 NOC condition), Samir Bannout, Aaron Baker, Vince Taylor and Lee Labrada. Again I realize that what I personally consider ideal isn't going to win a contest today.
There are guys around today who I think are great (David Henry, Jo Jo, Melvin Anthony Phil Heath, Richard Jones), but to win they'd probably have to destroy their aesthetics which to me is the result of the "standards" the judges are looking for. They don’t have that awe and shock appeal that RC or JC do. In my opinion the standards are wrong.
But opinions are like assh*les… everyone has one, no one wants mine.