I think that people who think of themselves as the best are really kidding themselves, Yngwie Malmsteen springs to mind, because others may think they suck.

I try to strive to be the best I can be, and I am never satisfied....no matter how many people will say they like my playing (which is satisfying), it won't deter me from trying to improve. I think that is what sets the great ones apart from the posers. I'm sure, for example, if you told Joe Satriani that he was the "best", that he would take your compliment, but wouldn't actually beleive it in his own heart....he would probably say in his mind "but I cant speed pick like Al Dimeola, and my legato chops fall short of Allen Holdsworth..."

To strive to be the best that you can be is an admirable quality, and I try to better myself continually....I hope I never get there however, because then what would be left for me to strive for?