I’m a caster main and had it a few times that I was dogpiled for using LB on trash packs.
Most often from tanks or healers and sometimes from melee who go off the rails if you do that.
I guess others had that experience too so I usually only do it if there is no melee in the party.
On the topic:
Normally I get the most comms as a melee dps.
You can zip around as a blm playing perfectly or rez the party on rdm and get no comms.
Then you can have a bad day where you stand in every aoe possible and get the pity commendation. It’s really random.
It’s best to just not care too much about them.
Tank gets it if they don’t instant pull or use a countdown,
Healer gets it if they rez me quite fast,
DPS gets it if they know how to play their job.
Other than that it goes to:
People who said hello > funny people > good portraits > female Miqo’te / female Au’ra / Thightlander > Lalafell > everyone else > Furries.