At performance evaluation time, my boss told me, “R, you are the smartest guy in the group, but you just don’t give a damn.” Had me pegged.
(Maybe a little TMI) My favorite compliment that I’ve received was given to me by my ex-girlfriend. Before her, I was rather inexperienced when it came to oral sex and the like, so the first time I went down on her was a big deal to me. It made me feel really good when I finished and she simply said:
“Wow.”
Still proud of that one 
One time I was eating out at a restuarant with some of my friends. Well anyway, I had to go to the bathroom, and when I got up, I saw that there were four girls (in their twenties or so) in the table across from us. I kind of gave them a little look cause they were all pretty attractive, and as I was walking away, I heard one of them say “Wow, that took my breath away.” Now the way she said it didnt imply sarcasm (or maybe I like to think that) and when I came back, they all had nice big smiles. Well, I think that’s the best compliment I’ve ever gotten.