I recognise the many advantages of stainless steel, and I own several such firearms.
That said, I find blue steel far preferable from the point of view of appearance and tradition. Being a collector of older pistols, I can't imagine, say, a Colt Woodsman in stainless steel. I have an early Detective Special, and the worn blue gives it a definite feel of having "been there", so to speak. It carries the evidence of the men who carried it. Workmanship, fit and finish was usually better on those old guns as well, making them even more appealing.
My first pistol was a Smith model 19, nickel plated. I bought it because it was the only suitable gun the man had at the time, but I always felt like a 1950s TV cowboy with it. Eventually I had to sell it, it just never sat well with me.
FWIW, I think Glocks and that breed to be ugly as a mud fence. I'd be offended by being shot by something so gross looking.