Curious Question... DPS Class players and Dungeon Commendations

[Meraii]

I've found that when I heal I tend to get a guaranteed one commendation and often get two, very rarely get three.
When I'm a dps I get one commendation maybe 6-7 times out of 10. I pretty much never get two or three.
I'm up to about 50 so far on this character (level 30-40).
My former main character that I was just a summoner on hit level 60 and barely had above 20. Then again I tended to not do any duties outside of the main storyline.

I think something that helps a lot is being friendly and saying hello at the start and 'thanks all' at the end.