A Crack in Time had the best music in the series. I am very surprised they didn't just hire Stewart Copeland again for the composing of the Ratchet series, like they did for the Spyro series. I mean, the original Spyro trilogy has got some awesome music. I wonder why they didn't

The PS2 Ratchet & Clank games contain some of the best game music I have ever heard. Can't really pick a favorite.

I like most of the music out of ratchet & clank 3.