While the USO is my favorite slam and Wimbledon is THE most prestigious, I'd take Guga's. Those three French championship's alone put him in the company of greatness like Borg, Nadal and Lendl. It's a shame injuries cut his career so short he could play on fast indoor and hard courts too. Guga is so much more respected by his peers too.
I hate how this whole "Hewitt is hated on tour" thing is played out.
ESPN makes Hewitt seem hated, the Arg's (aside from delpo) have beef with him, and there was that whole "racial incident" right?
I don't think people realize that Hewitt and Blake have practiced together since, and Hewitt has even on one occasion lent Blake his clothes when his got lost in transport so he could play. He's even danced with Serena at the Wimbledon celebrations and played mixed dubs with her.
Just wanted to get that out there, because I think Hewitt is downplayed way too much on these boards because of a few stupid incidents. Regardless, I'd say his career is much better than Guga's just for the fact that he had a strong hold for the 2 years he was #1.