Not really vain, but I answered "Other", because I spend more time beautifying my house than myself! (I figure it's a lost cause with myself...)
I'm annoyingly obsessive about keeping the house clean; even to the exclusion of giving up more enjoyable things, to stay home and clean. I have 9 cats, 4 of whom are long-hairs, so I have to vacuum each day--even if it's just using the DustBuster (great for this, BTW). I can't stand to see those "tumbleweeds" of fur lying around! Also, I'm fanatical about keeping smells down. Luckily, I can keep the worst of smells, the litter boxes, in our garage--the laundry room has a cat door that leads into the garage (we never use it for cars, just storage), and the boxes are out there, with a laundry sink to wash them in (I'm obsessive about those, too. When my Mom-In-Law laughed when I said I change the litter twice a week, and scrub out the boxes then, I felt like I was a nut--she only dumps the litter every 2 weeks, and even then doesn't wash the boxes out!) . When I change the boxes, I also sweep and mop the garage floor. I like the floors to be clean for my babies to walk on, and it helps keep the odor down.