Does anyone find the whole Myspace/LJ/Facebook/Bebo/whatever incredibly confusing?

I have an LJ account from ages ago which I never use, signed up to Myspace maybe last year, the password to which I can't even remember now, and just signed up to Facebook to see what it's about... again I failed to see what people use it for. Some kind of online address book with photos? Looking at Myspace gives me unending headache.

I feel so last generation O___O What do all you cool kids do on those things these days?!

(also, I did buy an electric guitar )

//edit// good god, I was doing random searches on Facebook and I actually found a LOT of people I went to high school with. Most of them probably didn't really know me but I recognize their names and faces. I wonder if I should message the few who were sort of my friends. It's weird because back then I didn't talk to anyone at school...