Smeags. Quite an easy answer for me really. He was my first friend on the site, he's the guy I've spoken to the most and he's helped encourage me to be more comfortable and to come back to the site after I left. Without him I probably wouldn't be here, and I definitely wouldn't be the guy I am today.
Then, ofcourse, I became a mod and he's an awesome head mod to boot!
That doesn't mean there aren't a lot of awesome users, but I don't "look up" to many people.