The ones that differ much for me is the call for more "Body" (to many different forms of body aparently) or less "tin". Can you turn the "Woof" down? Sure i'll get right on those Woof and Tin knobs and crank that body! More "Fullness", can I get less "Hum?" (No not an actual hum in the monitor... i was confused too)
Colors are another favorite... "Its got a little to much "Blue" Going on. thats getting a little much on the "Red"
Favorite one was a drunk merch guy for a jam band warning me about the Moog guy thinking that overdriving my input makes a great effect. Dude watch out for Phil, when he lays that moog down hard, he gets that "Bad ass ice pick sound" beating your head! You'll want to EQ that down a little....