I love it every time this topic comes up because it gives me another chance to say I NEVER skip a song on any of the albums.
I adore "MC5" - had a good laugh at the time when Kerrang magazine's review described it as "a tribute to The Ramones."
"Bi-Polar Bear" & "Art School Girl" have always been big favourites as has "Wicked Garden" (hear that 2nd guitar track?!)
I don't think any band ever has had the quality control of STP - my only gripe is that (for very good reasons) No.4 wasn't quite finished and "You Can't Drive Me Away" didn't make it.
Ok, I'll say "Dirty Dog" - not the best, I admit.