I wonder sometimes about the actors that are cast as Klingons and what that process is like, especially if they're not familiar with Star Trek. Do they ever feel goofy playing such simple-minded characters, as so many Klingons are? Perhaps they see it as a fun change from the regular small-time roles they play?
I think there's a part of us all that wants to spend a day bellowing "you have insulted my honour. I WILL KILL YOU WHERE YOU STAND!" rather than having to engage in rational conversation and social niceties.
So I've wondered if Klingons, makeup aside, are just really fun to play.
Which might mean, for the supporting actors who don't have fully fleshed out characters, that you don't bother too much with nuance and subtle hints of personality. You're just a snarling, blustering barbarian warrior.