So there are a lot of music threads, but I get the impression you put something out there and it just sits until it gets stale. So here's a way to keep things fresh through involvement and and puzzle solving. Example!
Post 1:
I like Patrick Watson.
Post 2:
You may like No Kids.
I like Crystal Castles.

What I want to lay down though is if you think some band doesn't sound like another, I'd appreciate it if you kept it to yourself. That way we don't start any flame wars and what not. I can't think of any other rules right now, so I'll play things by ear. I guess I'll start you off with one.
EDIT: New rule Only bands and artists, okay?

I like The Police.

You may like Modernist classical.

I like fast music.

You may like Metallica

I like Queen

You may like David Bowie.

I like Rush.

You may like The Mars Volta.

I like Queens of the Stone Age.

You may like Kyuss

I like Jethro Tull

You may like The Who

I like Disturbed.

You may like SlipKnoT

I like Madness

You may like The Specials.

I like Bloc Party.

You may like Stereophonics.

I like Nine Inch Nails.

You may like A perfect Circle

I like Miles Davis

You may like John Coltrane.

I like The Arcade Fire.

You may like Modest Mouse

I Like The Paper Chase

You may like They Might Be Giants.

I like Kelly Bailey.

You may like Frank Klepacki.

I like the Inkspots.

You may like 50 cent?

I like the Arctic Monkeys.

Then you may like African Monkeys.

I like steampunk.

You might like watervapor.

I like Metallica.

You may like Trivium.

I like You Am I.