I registered there around 2006 and was a bit overwhelmed at first. But gradually I built up my own little world and made friends with other users. It's really amazing how much fun you can have if you get involved. I have since left SL again.
I know it might sound a bit strange to many of you, but I would like to encourage you to give Second Life a try. It's a promising way to meet new people and bring some variety into your everyday life.