Saoshyant
Headphoneus Supremus
Tip rolling can create a noticeable change in sound depending on a few factors like ease of seal, aperture size, distance from nozzle/driver, etc. I'm generally one that does tip rolling for seal & comfort and not to try to change the sound, but at least in one circumstance there was a very noticeable change audibly, and not due to seal as both tips achieved in this respect. It had more to do with distance to nozzle, allowing a better capability for bass production.