My goodness!
For me, as much as I loved MySpace and I was on it all the time in my emo years, it's got to be Facebook. Everyone else is on it, it's much more user friendly than MySpace, in my opinion and it's just easier to navigate. I found MySpace to be a bit of a pain to navigate around and I look for ease of use more than anything. The only thing I would wish Facebook would stop doing, is changing the app layout every now and then.