I went back and forth about the whole online dating thing too. Since I was 15, I'd almost always been in some sort of relationship. So after I broke up with a guy in fall of 2006, I was single for close to a whole year. I started talking with one of my old friends from high school, and we dated for a solid two months before he woke up one day and decided that he "didn't want to deal with having a girlfriend anymore." I was devastated, and it took me quite some time to even think about seeing anyone! My best friend mentioned that she was looking at a few online dating sites and convinced me to try one out too. I signed up for Chemistry.com a few days later and was pleasantly surprised.
I went on a bazillion dates, and while there were a few who went on to second and third dates, there were a bunch who didn't make it to a second date. There was even one where I didn't make it through the FIRST date - I snuck out of the movie after the opening credits because the way he treated me and spoke to me at dinner beforehand was just horrendous! It's not an instant thing - you may get along with someone great via email but then in-person, things can totally suck. It requires a bit of work, but you get to meet a lot of people and maybe even experience new things!
For me, my main reason in signing up for online dating was simply that I'm too busy to meet people through my friends. My work schedule is never the same each week, and sometimes my budget is just too tight for me to go out to a bar or club (though I don't feel as though you can really meet your soulmate while out a bar lol). I chose Chemistry.com because they do the work for you. They find potential matches for you and send you five new ones each day. You can decide if you're interested, and if you're not, they just ask that you tell them why so that the matching system can be perfected a little bit for you. Match.com required me to do all the work, something I didn't have time for, and I was getting nothing but "so-and-so likes you!" messages from creepy men in their 40s or 50s (in one case, 70s) who blatantly said on their profile that they were married and looking to mess around, or simply mess around. Don't think so!
Eventually, one of the first guys I was matched with at Chemistry.com became my boyfriend. We're going through a rough patch now and pretty much starting over, which sucks but it seems to really be helping. We're getting there, as I like to put it!
So there, that's my story. Online dating doesn't work for everyone, but it seems to work for a lot of people. My best friend who convinced me to do this with her found her boyfriend via Chemistry.com too. And one of my mom's co-workers met her husband on eHarmony. While initially, I thought online dating was a load of crap, I've come to the realization that it really is something that works.