I avoid using the copy/paste function when working on my comic because it looks very obvious considering that the comic is mostly drawn and colored traditionally. I used it in this comic though, and I think it turned out alright.
Yeah, I'm not a fan of copypasting in comics either but when things are REALLY still I think it adds a nice emphasis!
@Oly-RRR: It definitely can! Like any tool it can be used well. I try to use it sparingly so that when I do use it, it has greater impact and doesn't come across as laziness.
All's fair in love, war, and editing.