Personally I like function over form, to a point (heck, I bought a Rocket III and that really isn't a pretty bike--but that's not why I bought it). But I prefer when design and functionality are synthesized together for an elegant solution.
I would probably never run without SOME kind of oil cooling. I agree the stock cooler is ugly but like most I "tune it out" when looking at the bike. That said, I like the downtube-style oil coolers but I could never buy one from BP. I'm actually fairly intrigued by the Streetmaster solution of plumbing the frame downtubes, particularly because (they claim) it actually works better than stock (function AND form--elegant).
But overall I just don't care, at least not until I make a show-only bike out of one of them.
