Personally no - we're doing the job we're supposed to do. I don't give a tank a commendation for keeping hate, or a DPS a comm for doing damage. But if I see a Tank has used initiative at a point where something could potentially wipe the party and he's saved us, or a DPS has cleverly interacted with a mechanic or has otherwise remembered to use their available support utilities then yeah, I'll comm them. In full parties if none of the above happens, I'll probably just comm the other healer for a job well done.