I'm not saying I have a romantic ideal or anything, just that if I do it again it has to feel right. I don't want mind games, or that sense that I/they want something other than what we are.
I had a couple of "mind games" type relationships after 1st marriage broke up. God, they are hard work! They did sort of leave me in a "I need to be in a relationship to be happy" frame of mind afterwards though. Took a couple of years of being single to get me through that. I can remember coming down the stairs one morning, realising I had a good job, a nice house, a few good friends and was fit and healthy, and deciding that I was ok on my own. My only regret would be that I never had kids.
About a month later, my now husband and father of my daughter and I got together. We'd known each other on and off through work for about 10 years, but it was only then that we were both single at the same time, spent a bit of time together "as friends" and hit it off. We are very similar, and there is no pretence on either side. We can (and do) share everything - something I've never had before - and are equals in the relationship (except he can't cook, but I'll let him off 
I know someone c.50 year old who was looking for a younger woman, but it was definitely due to him wanting kids and knowing that someone the same age would rule that out. (he's found a lovely late thirties lady, who suits him very well)