This may be more of a sanity check than anything, honestly. Picked up a variety pack of Jazz IIIs today since falling in love with a standard nylon max grip one a friend left at my place a while back. It came with varying thicknesses of tortex, ultex, nylon, and a single "carbon fiber" pick. While I was fooling around with the picks to try out the different feels and grips, I seemed to notice even larger differences in sound. Mayhaps my ears are fooling with me but this is about how it seems to shake out*: Tortex - harmonically richest sound and fairly balanced. Neutral or slightly subdued attack. Probably my favorite sound wise. Nylon - brighter sound with a very aggressive attack. The black stiffo is definitely the brightest of the bunch it seems. Ultex - roundest of the bunch with a very warm sound and lax attack. Carbon fiber - somewhere between the tortex and nylon. Richer sound than the nylons but with a more aggressive attack than the tortex. Seems like it may be the best all-arounder of the group. I'm sure I'm not the only one to hear these differences, but curious if anyone else finds them as distinct or containing different qualities than I hear. *All played through same tele bridge pickup, through same Mesa head with same settings, into same cab at same distance from playing position. Demo tune was Good Times, Bad Times for the most part.