[quote=@Balthazar]
People who assume things during introductions. Recently I got accused of god modding a character after talking with my co-gm about how we're going to make this character flawed. Then this bloke parades in, throws accusations and ridiculous ideas in a realistic and so far logical rp, and it's only the introduction. 

And charcters that do their own thing without sticking to the plot/story line.
[/quote]

One, let me apologize for a bump in this thread, but I felt like I should address this cause I have a good two cents about this matter.

The thing I see with people who take the plot into their hands/don't follow a certain script can be either a direct result of the GM's not allowing their players to get into the main plot/being more open or indirectly of there not being enough opportunities for the players to get into it/having their own side-plots taking precedence. 

Not sure if this was what you were meaning, but yeah. If it wasn't, well then just consider that something that annoys me(the part about GMS not allowing people to get in on the main plot by making it so closed up that people have to make up extensive side-plots just to have something to post about).