I saw the title and I hit reply without reading anything.
With all due respect to my beloved CP members, it has got to be Gonzo.
1- He has been very active. You can find his replies and insights in almost any thread.
2- He's a supporter.
3- Maintains good rapport with probably every member on this board, which is a very tough thing to do :P
4- He almost killed himself saving his child.
Don't tell me that this image is NSFW. Go ahead and cite me.
If I may add other nominations, they will be on this order.
Second comes Simply Red for his really quality and dick raising, stomach growling posts.
GoCheifs, Gif'd thread is pretty good.
Demonpenz, MS paint King but he has not been that active in the latter part of 2009.
Hamas Jenkins, for being Hamas Jenkins.