Cut Filter. Who seriously is interested in spending 30 minutes watching/hearing about what FF character random internet fanboys identify with? Or which video game character should have their own movie, or other nonsense like that? Sure, Diane Mizota is pretty damn attractive, despite whatever embarassing cosplay outfit the producers throw on her, but it doesn't make for an entertaining half-hour.
Bring back Unscrewed and restore TSS to its original state. Like Pulse, as dskillzhtown said, these are the only shows that seem to take their subject matter -- not to mention their audience -- seriously, and were great because of it.
Icons is G4's Biography and should be treated as such. Make it an hour-long show.
XPlay seriously needs some work. It's a good review show, but Sessler's obnoxious behavior and Webb's vapid line readings REALLY need work. I do agree that they've got great chemistry and that they really work off of each other well, and that should be expanded. Make them more likeable -- and give them some better writers -- and the show can really work again.
G4TV.com. Either give the girls more interetsing topics to discuss and less tubs of pudding to pour on each other, or just cut the damn show.
Judgment Day. Ugh... Um, ok Victor Lucas works well here, and is obviously interested in making a reputable show out of this mess, but for God's sake CUT TOMMY TALLARICO! He actually manages to be more useless than Mizota, and he doesn't even have the breasts to fall back on! Seriously, when you knock points off game's because you don't like their names (!), you can't possibly take yourself seriously -- let alone expect other people to.