If we're talking about the things that sometimes crop up mid-scene and make me want to eat rocks:
Writers that make using a real face claim creepy. Listen, this discourse is tired as hell and I'm not trying to start it up here. It's something I get away from more and more as time goes on, but...
Wow. Kindred spirits.
I haven't gotten to do a ton of arcs in which my character goes from happy-go-lucky to jaded as the final evolution - because as it turns out, people really like happy endings - but damn is it a lot of fun.
I'm definitely on the younger end here, but I've been roleplaying for damn-near 14 years now and I've seen some considerable changes in my outlook since the days of AOL and Myspace. Changes that would make me look like a bit of a grump but boil down to having been around the block a few times...