Do you know any quirks?

Gosh, I've gotta say, when I read a book and a character has a Quirk, I really hate it (Stephen King does this to death). But a thought that has crossed my mind before, specifically about vegetarians, is that it would be funny if they used the most disgusting things to fertilize their garden, say their own fecal matter (Not sure if human poop becomes legitimate fertilizer if you stop eating meat products though). If not, she could still use boogers and rotten food as a substitute. Don't sue me if I use the same joke in the future though (I plan to have my own cartoon someday... 'sigh', someday...)

Other possible (although more cliche) quirks:

-Chews the same piece of gum for extended periods of time, and even when she has to take it out, she just puts it behind her ear to save for later.

-Makes her own cheeses or wine, but it makes her stink, or stains her hands and feet.

-Always talks about a new terrible sounding recipe either she has invented or heard about (I know a vegan couple who does this a lot).

-Has a contradictory lifestyle (works for a large Corporation, or drives a gas guzzling car, and possibly always says she means to get a new eco-friendly car)

-Has a weird affinity for a certain type of food (an obsession with eggs would be REALLY creepy)

-Her parents always call her a hippy, and are all uptight like they're from the fifties.

-She rambles on and talks a lot.

-She's always in a track suit and jogging in place when she comes to talk to you, like she's constantly out on a run.

I don't know, I could pretty much go on forever, but this answer is probably already to long.

she could have TB, which lets you write almost anything quirky with her. for instance, she could be in an airport, and start shouting "bomb!"