When you can remember the sequence to open the Operator's Door, but have forgotten your ATM PIN.
When you start to consider dying your hair white.
When you walk into a bar and ask for Temerian Rye.
When you stand in a supermarket thinking "I know there's something else I need to buy, but can't remember what..." and then remember that it was the Robust Yellow Meteorite Sword diagram.
When you send yourself to sleep at night by counting exploding nekkers instead of sheep.
When you expect every woman to fall for you despite being pasty and ugly.
When you get upset if somebody calls your hero "pasty and ugly".