Bantam yes Glasgow. I've been on first dates with a number of 'decent' guys. Nice enough, not horrid looking, but just not enough spark to want to see them again. One couldn't hold a conversation, every time I paused or asked him a question it all went silent. Another, we had quite a lot to talk about (mostly music) but he had no children and all his friends were only just getting married (he was 41), so think he was quite used to his bachelor lifestyle. I think it would have been a hell of a shock to his system to see what my actual life was like with 2 kids still in primary school! The only two men I've met in the last 7 months I've wanted to see more than once both lived in Edinburgh. Talked to quite a few online who seemed like there might be a 'spark' with but all lived even further away so I refused to meet them.
As for my "approach" to OD. Tried match twice very briefly but never found anyone I even wanted to talk to so deleted my profile there. Chatted to a couple of interesting men on POF but got put off by the chancers and 'smoooooth operators' (another deleted profile). So...that's left me with OKC and Guardian Soulmates.
On GS (had a subscription for a while, still have a profile there but not subscribed anymore) - I would "like" men who looked nice and sounded funny and clever. In a few instances I even sent them a message first. Or if someone "liked" me I would have a look and possibly "like" them back and then wait to see if the wrote to me. Similar on OKC I guess, just without the "liking". I set my profile so that I can browse anonymously and then let the ones I liked know I visited.
I like first messages (whether sent or received) to be brief but obviously not generic. So, "that's a nice photo of you on the beach, where was it taken?" or, "we seem to have similar taste in music, what was the last concert you went to" or even at a push "I thought your profile was quite entertaining, let me know if you'd like to chat". I keep my instant messaging firmly OFF and only exchange messages through the site until I've decided the guy is not sex mad/crazy/stalker/scammer etc. Sometimes I'll move on to email before a first date, sometimes not.