I join plenty of DF parties for the daily roulette's. I don't pick just prime time, due to my work schedule, it can be at any time of the day/night. I always at the end of the run, commend the dps that was great. I don't commend tank or heals, since DPS is always the ones that never get noticed. However out of let's say 7 roulette's, I can only commend 1 or maybe 2 DPS's, because it's that bad lately, and in most cases I don't even give out any commendation. Maybe one day that will change, and we can actually commend somebody that did an outstanding job. I don't lose that hope.

Edit: I would feel bad, if I gave out a commendation after every run, especially just because I liked somebodies glamour or somebody type'd "hi" at the start.