I've been on.....maybe 8 or 9 dates from Eharmony in the last couple years? I think the only thing that sucks is that while I have something like 800 in my new/uncontacted (ranging over that time) and have been out it never seemed like I met anyone who I could have been wild about - I really wanted that but, I don't know. The situation so far has been, or at least was for a long time, that out of every 20 or 30 matches I looked at I'd only see one who even caught my interest enough to contemplate contacting them, most of the others I can't figure out why they matched me to them at all. Because of this most, if not all, of my dates from Eharmony have been from them contacting me - not vice a verse, girls who I thought 'Well...there could be a possibility, we have x, y, and z in common, I like her style... on (a)...", I guess personalities clicked superficially, I liked them as people but, the spark was never solid enough from my perspective.
Over all I get the feeling that Eharmony will be great for experience and learning what works, what doesn't, and why, but I still have a feeling that the kind of person who's right for me is very unlikely to be on there or, at least in my area.
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The loneliest part of life: it's not just that no one is on your cloud, few can even see your cloud.