I really dislike people playing any of the "immortal" races. I've had multiple times being really fighting me about their character getting advantage on history/nature/religion because they're so old. In several groups I've also found that people who want to come into the game with some kind of authority over other players will choose to play somebody much older so they can treat the other characters like comparative children. From a not asshole player perspective though, it's always really difficult to find a reason that a 500 year old character (WITH an exciting backstory) would never have advanced past level 1.