Zen Bard said:
Someone who's out of shape.
I'm no Mr. Universe, but I like to stay active (martial arts, parkour, bicycling, etc). And I simply can't be around a girl who doesn't.
One time I met a girl on a dating website and her picture and profile were just stunning. We talked on the phone and hit it off. But when we met in person she had...shall we say..."let herself go". Add to that, she said she became "anti-exercise" because she was tired of staying fit for other people. She also didn't care about their opinions on her appearance or physique.
That was an instant "nope". One, I like to stay in shape for myself. I feel better and I get to stave off all those health hazards that run in my family (high cholesterol, high blood pressure, etc...). Two, I like doing outdoorsy things on dates, so someone who's not into that wouldn't be a good fit for me.
And three...I'll admit it. I'm shallow.
Whoo, this is an interesting one. My ex used to work out when she was younger, but she had pretty much dropped all exercise when we were dating. There was not a single part of her body that was firm, but she looked... ahem... shapely. Very.
I'm curious, would that also be a problem for you? I mean, not working out, but not having let yourself go entirely either. Being 'floppy', but looking great. I mean, is it just about the look, or is it taking a shared interest in athleticism?