It just depends. If the run is relatively quick and normal, someone to make me laugh gets the com. When I'm BLM and there's a stack marker on me during leylines, I want to com everyone who came over to me. When tanking pre-tp removal anyone who goaded me got a thank you and a com.

Or on the other end, when a mentor was explaining mechanics to me back in HW and they died instantly on the first mechanic and typed in all caps "DO AS I SAY NOT AS I DO" I died next laughing too hard. He got the com at the end.