I've met quite 13 women through POF and OKCupid. Out of that came a short relationship, two mini-relationships, and two one night stands, a two night stand, along with some pointless dates and lots of flakes/two stand ups. All the relationships or relationshipettes ended suddenly or badly.
Most people have been more attractive in the flesh than in pictures. Pictures don't convey the way someone moves or laughs or whatever. It can be the non pixely things that make the difference between attractiveness or repulsiveness. There was one girl though who only had head shots and an 'undisclosed' body type. She turned out to be really fat and man shaped. Luckily(?) she just asked for more dates and then flaked continuously. Total nutter actually.
Because with her there was endless talking (like 2000 texts/messages) which lead to nothing, I therafter always set up a date within a few messages. Just establish you have some things in common, that you're attracted to each other's pictures and meet. Then again, there were women who I could see I had no attraction to in pics but had things in common with, or the reverse so met anyway. Doomed from the start really. I've found plucking people from the internet when you otherwise wouldn't have met tends to lead to doom really.
As for the women I found myself unattracted to upon meeting, I simply continued the date, got drunk enough to improve their appearance and tried to sleep with them anyway. I was going to be spending good money on drink, so I may as well get my money's worth.
Also: Most guys like about their height. So you may be meeting a midget.