I personally think the gnome female sounds like a little pipsqueak, but I have the visual to associate with it.
There are a few really good sayings. The problem is they will get old quickly. People have been spamming them as of late, and I'm already starting to wear thin...and I'm usually the sort of person who never gets sick of anything I like. (I can listen to the same new CD I bought for 3 days straight on loop if I like it.)
A few funny ones though...these are paraphrased:
Gnome female flirt: I do not believe a scale of one to ten is sufficient. I believe a twelve tier method of analysis to be more adequate, with additional parameters for mechanical ingenuity and torque.
Night elf female: I think the guys just use the Emerald Dream as an excuse to avoid calling me back.
Human male: So an orc walks into a bar with a parrot on his shoulder. The bartender says, "Where'd you get that thing?" The parrot responds, "Durotar. They got em all over the place."
Dwarf male: Oh, I'm just a social drinker. Someone says "I'll have a drink" and I say "I'll have one too."
I don't drink anymore. 'course, I don't drink any less, either.
Only the exceptions can be exceptional.