I don't find any of the bracelets on my watches uncomfortable, and honestly, I have to admit that I can't tell the difference when wearing them either. Perhaps this is because I wear my watches in the classic way, i.e. so loosely that the first finger limb still fits between the bracelet and the wrist – so I have to show all my watches with a bracelet here.
However, if the initial question were to be which watch has the most technically interesting and innovative bracelet, the answer would be clearer: The Porsche Design by IWC Ocean 2000 with the Geo 2 bracelet geometry developed by Lothar Schmidt.