I have some:
- They complain about every change that was added in the game or sequel. For example, every QQer on a patch day in WoW for the last 18 years. Or when LFR, Flying, and new races/classes are added, people will complain.
- They have an irrational orthodoxy in which old games are better than newer or contemporary games. Example: Diablo 1 and 2 fans are lashing out at Diablo 3 despite D3 being 10 years old.
- The immaturity. They have a childish sense of grandeur and that anyone who disagrees with them over anything is dead wrong or, worse, an evil person. There are too many examples to single out.
- They believe they are better than others because they spend 10 hours twiddling their thumbs.
- Hypocrisy and double standards. They always say, “Graphics Don’t Matter” when defending old games with grainy graphics or games with somewhat primitive looks. But they quickly bash a modern game for being too colorful or cartoony. Example: D1 and D2 players saying that the two old games are fine for their grainy graphics but go bonkers for D3’s modern day graphics.
Those are what I can list. What are yours?