When I read the thread title, I came here to answer no one was my poker idol, but I was thinking of Negreanu as a good player with a good personality. It seems he is Cardschats #1 favorite and I can see why.
10 years ago, I would have answered Sammy Farha. I've seen more clips of him now, and he is very entertaining. He's kind of a turd sometimes and that bothers me. Winning Sammy is fun.
Also, since I didn't see much mention, a few I like:
Doyle Brunson
Johnny Chan
Carlos Mortenson