I'd rather have a plain (or even ugly) girl who's game than a pretty one who thinks she's too good for me.
You know what? Ugly girls need love too, and they're less likely to be offered it, so they're easier to pick up. Low hanging fruit, and all.
And if you're like me, every time you see an ugly woman with a child you think "my God, someone had sex whilst looking at the back of that head!"