Thotz? I'd say the great Bends masterpieces, like My Iron Lung, are my favorite because RH was visceral and daringly crafty at the same time back then.

Later in the progression I'd say Paranoid Android was a great track, and then Pyramid Song off of Amnesiac, Wolf at the Door, Everything in It's Right Place, Climbing Up the Walls, and Daily Mail/Last Flowers/Go Slowly as the three crazy sad songs. I can't choose a favorite personally.