Bands/artists that you regret not paying attention to

Deliberately or not, which bands do you wish you'd known earlier.

I ask this because the Stone Roses completely passed me by, until tonight.

I've just listened to their first album and I don't understand why I don't own it.

The Who, Talking Heads, Britpop, funk, all rolled into one.

Anyone you've discovered recently that puts you to shame?