Why I like Spotify?

I like Spotify. Yes I do, and even if I just use their free plan - which means that every few songs I have to listen to their ads - I'm ok with that.

Why I like it?
When I work I like to listen to some music and because I don't have (never cared) a big music collection on my laptop, I'd prefer to listen on-line streaming.

oh, and there is Pandora app available as well. So If I decide that Spotify is not good for me anymore then Pandora here I come.