@Faraday said in "My Guy Syndrome":
But a lot of those things aren’t inherently bad. If your character wouldn’t think the planet is safe, and it’s really important to you to honor that, I don’t think it’s a cardinal sin to politely sit a scene out. Same for RPing out an IC grudge, or some of the other things you listed.
And sometimes this goes all the way around to what @Muscle-Car described as weaponizing my-guyness. “Hey, I’m sorry I blew up your character’s car that she got from her grandfather and rebuilt with her own hands, that’s just what my guy would do. Wait, why are you being such a My-Guy jerk and holding a grudge about it? Why can’t we just go back to being friends? You’re not being a very good collaborative roleplayer.”
Acting and reacting in-character isn’t binary, and, like a lot of things, it’s good up to a point and bad when taken too far. Of course, not everyone agrees on what constitutes “too far,” and that’s kind of the root of the problem. Some things are almost always not OK (the thief who murders everybody else in the party and steals all the loot because “that’s what my character would do” – but even this might be fine if the expectations are set appropriately). Some things are almost always OK (holding a grudge against whoever murdered your character’s best friend – but this can still be taken too far and become not-OK). Lots and lots and lots of things fall into a gray area where some people think they’re fine and other people think they’re not.
Communication helps, but even then you sometimes run into disagreements between players. What to one person feels like raising a reasonable concern over what someone else’s character might be contemplating, might from the other side feel like inadequate player-character separation (“gosh, she’s getting really upset over something that’s happening to her character”).
There’re just an awful lot of ways to misunderstand what’s going on in someone else’s head, and many (most?) of us aren’t really that good at putting ourselves in someone else’s shoes. I don’t think there is a single solution here other than to try to listen to what people are saying even when they aren’t saying it out loud, and that’s a really hard skill to learn.