Oy... I've been out for a week, but I'm back! I'd have to say my favorites are:

Vai
Satriani
Van Halen
Malmsteen
Cambell (from Dio)
Rhodes (the man who inspired me to pick up a guitar...)
Petrucci
Gambale

I decided recently that yeah... there is no best guitarist. Every guitar "god" is specialized in their own department. I used to live by the word of Vai and then realized that, hell, Gambale could kick Vai's ass in a different musical field without trying. But it's also the same the other way. Both are amazing players, but they are great in there own different ways.