Some very popular knives have them -- BMs and HRs come to mind.
Which is one of the reasons I don't own any of them. When it comes to blade design, I'm pretty much a purest. The fewer lumps and bumps and dips and striations and corrugations a knife has, the better I like it. I'd take a BM-E or an ASH-1 or an NMSFNO any day over an FBM or an HR or a Sus Scrofa. But that's just me, of course. <img src="/ubbthreads/images/graemlins/wink.gif" alt="" />
Form follows function, for sure. But form is nice too. <img src="/ubbthreads/images/graemlins/smile.gif" alt="" />
I don't know, there is an appeal to simplicity, but I won't buy a blade unless it really jumps out and grabs me. I want it to perform great first, but it has to appeal to me visually as well.