Back in the day I know I liked Confessions of a Mind, and their post-Butterfly albums in general -- over their mid-'60s stuff, even -- I have positive sentiment towards, though I remember nothing much about them.
I also really liked "Nitty Gritty / You Really Got a Hold On Me" but never listened to any other track on the album, which was one of their first two.
Np: Billy Gunn's (aka Mr. Ass) entrance music, "Ass Man":