So, personally I love the baritone. It is my baby, and It has the sweetest sound of all of them, with the deep melodic bass that can still go up into the lower ranges of the alto. It adds a sweet taste to the tuba section. I also enjoy the tenor for its jazzy sound, and once again, adds the woodwind sound to the primarily brass melodies that the trombones play. I think that bass is pushing it, and below that is too far *for me to play* As long as its played well I do like listening to the really low ones. Also, tubax sounds better than contrabass, the tubing gives it a more controlled sound. As for the higher ones I would probably just screw around on those if I played them. Although they are nice to listen to if the player is good.