I never had a MySpace, I got FB when I was 15 or 16. Mainly because the people on it do my head in, some status' are painful to read. That's probably the reason I don't use it much/don't have twitter yet. I stick to Tumblr, seems to have less idiots.
I made a MySpace and logged into it like once... I made my Facebook because a dude I was chatting with online got tired of whatever we were using to talk and told me just to talk to him on Facebook. So I made a Facebook to talk to him.
The way I see it, social media is the future of socialization. FB/Twitter/all that stuff is how the incoming generations are going to be socialized.. and I really don't like the sound of that...
I first created a MySpace at 13. A few months down the track, I realised everyone was moving to Facebook and tried that out. I've used MSN since I was 11
I think I was 17 before I joined MySpace.. Wasn't really popular when I was at school. ( 22 now ) Then I must of been about 18 when I joined Facebook.. Don't really post that much, and hate reading peoples statuses when they're thick as pig shit.
Also, I hate it when people express their love over Facebook. Makes me wonder who they're trying to convince.