I would have once said Nadal, but that was because I had only seen him on TV, but I was lucky enough to be front row for his match with Tommy Haas at the AO this year and have completely changed my mind. Become a huge fan, actually. Moonballs? Idiots!
I find Berdych pretty boring, to be honest. A very one dimensional game.
Murray should be good to watch, but he gets into that defensive mindset and drives me mad, which is a shame because he really does have the shots...
DelPo is a bit boring too, it is fun at first, SMACK, SMACK, SMACK, but you soon tire of it and there isn't anything else to see in his game.
But this is a pretty silly thread, I defy anyone to watch any player in teh top 50 from courtside (NOT on TV!) and not be enthralled.
maybe that's just me.
whoever said Ferrer needs to see him play live, the energy is unreal, and I have seen him come to the net, hit FH winners, do lots of things besides 'grind'
actually, that is pretty much my answer, unless you have been down at court level watching these guys, you just have no idea.