What genre are Mum and Plus/Minus? I don't think I've heard of them, but I always like to try out new kinds of music.
I think classical music and celtic music is really beautiful. Whenever I listen to that stuff I just really feel at peace. Also, I just started listening to this band called Nightwish. My iTunes classifies them as symphonic metal (didn't know that was a genre until now...). It seems kind of like a mix between opera and rock (strange, I know). 'Over the Hills and Far Away' by them is really really pretty.