All depends of the context, for example, you can use "sobre" as about, but also you can use it as "above" and it has a third meaning; you can use "sobre" as  envelope. I know, it sounds really difficult, in fact I find a little bit difficult to explain it. Here is a few examples:

The class was about numbers-"La clase fué sobre números"

The cloud is above the hill . "La nube está sobre la colina"

The letter has come in an envelope. -"La carta venía en un sobre"

I don´t know if I explain myself, I do my best, it's hard to explain even for native as me. 

And in all cases that you use sobre you also can use "acerca" or "se trata" this two only means "about" and are more formal, and probably is more easy to you use this.

I've to say MUSE, Arctic Monkeys,Queen, Coldplay, The Beatles, Radiohead, Joy Division.

My playlist is big, but always has to have music of Muse, Arctic Monkeys, The Killers, The Beatles, Franz Ferdinand and Radiohead. If you like indie rock I recommend you this bands ;)

I like to go out and party with friends on fridays or saturdays, on sundays I like to stay at home all day watching american football or seeing my concerts DVDs.