I'm not sure if I'm using the proper term, but what parameters affect the fineness/coarseness of bubbles in beer? I've noticed a lot of the beers at my homebrew club meetings have very coarse bubbles, like in soda-pop. My beers tend to have much smaller bubbles, more like foam. Is bubble size an indicator of other issues with the beer? I'm guessing it's related to body or protein levels, but I dunno.