There was a study of online dating recently which showed people generally contact people who are 25% more attractive than they are. This may account for some of the poor results men have, if they're routinely trying to date "out of their league".

On the other hand, 50 year old men and 18 year old girls are the most popular!

White men and Asian women being the most popular.

What I'm getting at - if you have a "type" you may be unnecessarily limiting yourself. And I can speak from experience that someone who only seems ok in attractiveness can gain a lot in attractiveness as you get to know them.

As for the selection of singles at our age - sure, some people are single for a reason. Early in my post-divorce dating that was because I was subconsciously picking people who weren't relationship material. Then I was single because a four year relationship turned out to be badly bipolar and a liar. Odds are I'll be OLD again sometime in the future given CMMs prognosis. Does any of that make ME an undesirable date? I don't think so. Plenty of normal people are online dating too.