In comparison, and again, I mean in comparison to the rest of the songs released as singles, I'd have to say Big Empty.
There.
I said it.
Now,I like the song a whole hell of a lot, it's just that I like "Wicked Garden" "Plush" "Sex Type Thing" "Creep" "Vasoline" "Interstate Love Song" "Pretty Penny" "Big Bang Baby" "Lady Picture Show" "Trippin' on a Hole in a Paper Heart" "Tumble In The Rough" "Down" "Sour Girl" "Heaven & Hot Rods" "No Way Out" "Hollywood Bitch" "Days of the Week" and "All in the Suit That You Wear" a lot more.
Notice I left off the two covers. I'm only counting STP originals. Otherwise, "Break on Through" would be my pick.