Ahh yes, the old "you don't drink your Bourbon the right way" argument rears it's head again. The best way to drink bourbon is the way you like it. For most of the bourbons I drink, I like one cube to cool it down and add a little water. I've got stones, but don't find them to alter the temp much, and I end up adding a drop or two of water anyway.
Of course, real men go with the "RJtini" as discussed earlier in the thread.
People can drink however they want, of course. At temps below 55 degrees (I'm guessing but somewhere around that) you can't tell the Beam from the Booker's though.