Yea, same here, i LOVE deadlifting (this is what is gonna help me beat you to 500 lol).
Yea, u do look like u were meant to be a puller, some people have it, some dont.
Shades, have you ever done lockouts, with bands or the cables? really will help with the lockout part of the lift. Also, since ur on the 5x5 i know u dont have too much to play with, but another good DL excercise is to START standing on mats, maybe like 3 mats piled up. So basically, the DL starts alot lower then the normal, helping the lower part of the lift.
BTW, dont listen to the tips, i wanna be able to atleast hang with you at 500 lol, jk. Thank god i got a fellow DL lover here lol (now that sounded rainbow