****DISCLAIMER-I know this is probably going to sound bitter and like a rant against men, but honestly it's not. Believe it or not, I do like men and am hetero. This has just been my experience. Some have been more successful than I at online dating. Or I guess just dating, period.*******
I signed up on POF - which appears to be more of a "fuck site". I can't believe some of the stuff people send/say. I don't really want a "dick pic". I'll get to see it if we get horizontal. That is just one of the more "memorable" experiences.

I met a few people who had potential, then *poof*, the original individual I met morphs into someone completely different.
I had a horrible "coffee date" with a guy who swooped in to kiss me after walking me to my car. Fortunately, I was quicker than he was and he only got my cheek. I never messaged him, gave him my phone number, nothing. Pretty much means "not interested". Right? Not so much. About two and a half weeks later, I get an email from him apologizing to me for not getting back to me sooner, but he felt that there was "no chemistry". REALLY? He ends the email with "if you don't agree, write back and let me know". WTF? Idiot.
The next one had a problem with a particular attribute of mine and berated me for it.
/enddate
I dated one for a couple of months only to find him still on the website, talking to other women - a fatal flaw when you're dating - ok, SLEEPING with - someone. There's a lot more to this than what I've posted here, but this was a factor right from the start because I never felt like I could trust him. Once we'd established mutual exclusivity, the understanding was that profiles would be at least hidden, and then if things progressed, eventually deleted. I stayed in it longer than I should have because I listened to what he said rather than what he did. I deleted my profile after that. I'll take my chances at 49 and meet someone IRL rather than do that again.
I met another one and went out a few times with him after exchanging emails and text messages. He always said how much he enjoyed talking with me..blah, blah, blah. So we make another date to have dinner at his house and cook. I get a text message from him on Saturday saying his "mother had to go to the hospital" and he'd get back to me. It seemed pretty obvious he'd changed his mind for whatever reason, (given the fact we talked via text/email so often, then..nothing) so I made plans to do something else. He did text late the next afternoon and apologized for not getting back to me, but I had no intention of responding to it or seeing him again. He has never emailed/sent a text since. I mean, come on? You can't get more original or, GASP - be honest and tell me you changed your mind, or you met someone else? We are not kids. At least not in my age bracket. And younger men are not in the scope of my dating interest, so the dating pool prospects are pretty limited for me.
I guess the older we get, the more baggage we bring along with us, like it or not. But a 50 year old man's expectation of a 20 or 30 - something figure with the intellect of a 50 - something is unrealistic. They appear to be less "forgiving" than women do of them at our age. Most of them are starting over after a divorce/bad relationship. Also, the degree of inflexibility I've encountered meeting people my age is disheartening, to say the least. Seems like if I don't "bend" to meet someone else's expectations, then I'm destined to be alone. I have learned to be ok with it. I've got a good job, self-sufficient, own my own house and have a certain degree of intellect, although my sanity could become an issue.

I suppose that I am also not too hard on the eyes since people have said as much.

Several of my relationships in the past have been damaged/destroyed by online dating. It's so easy to create a profile and "troll" while you're in a relationship with someone else. To catch someone that you're living with on a dating website is a feeling that is indescribable. Betrayal, anger, sadness....
Suffice it to say that I am not looking, but if someone came along and there was mutual compatibility, I'd be open to it.