OKcupid is my go-to, I go for a couple of weeks every now and then. It works great, so personality things I don't like, like Christians, (I will never date a monotheist), I never see, because they are knocked down into the 70%'s and lower, which I rarely check.
1. ....we'll just say "attractiveness"
2. Wrong answers to sex questions. OKCupid lets you see the answers, and I check after the "attractiveness" requirements are fulfilled.
3. generic and cliche profiles
4. Every picture has a drink in their hand
5. Gummy smiles (where the upper lip is stuck way at the top of the mouth)
6. Man-hating profiles, where most of the profile is complaining about how much men suck, or talking about what they don't want, or using a phrase like "I want a MAN, not a boy"