I was listening to In a Glass House by Gentle Giant today, and now I remember why I used to listen to it all the time: THOSE RIFFS!
The intro riff of The Runaway
The riff before the vocal harmonies in the bridge in The Runaway
Chorus riff of Experience
The 29/8 (or 7/8, 10/8, 12/8) riff in In a Glass House which is amazingly catchy for being so oddly timed
A bunch of other riffs in In a Glass House