Names like Gemma82 or yummymummy1.
There's so much choice. Obviously I'm a sucker for a bad pun. But I love the variety of names on here - great song lyrics, obscure references that I feel compelled to go off and google (and never google again in the case of dragon butter), bizarre word combinations and so on.
There are some notable exceptions but normally I make an assumption that if a poster can't think of an interesting name then they won't have anything interesting to say.