two and it could be harmless. more than that and it's probably an obsession, especially if there are OCs involved.

used to write with someone like this and assumed it was because they just liked the actor and his work. until they tried to share their rpf fanfic about him with me. they played at least 5 characters with his face. 3 of them in the same game at one point.

they later joined one of those 'celeb' games as the actor and had him divorce his wife to ship him with other celebrities, while playing his young kids as NPCs. very weird to say the least.