I agree also.
I've noticed over the years that many owners immediately start changing things and, as Dazco said, not always for the better. I guess beauty is in the eye of the beholder, but some of the things they do to their bikes are simply terrible!
What really gets me is when they try to turn the Bonneville, Speedmaster, America, etc., into a road burner. It seems to me that if they wanted a screamer they should have bought a Daytona or a Speed Triple in the first place! These bikes have their limits and were never intended be anything else but a nice road bike.
But I never poo poo anyone's bike. I either don't comment or just say "nice", "cool", whatever, and let it go at that.
Changing the shocks, mufflers (silencers), handlebars, seats, re-jetting, for example, still leaves the bike looking standard so I have no problem with that.
I think the design of the Bonneville, for example, is spot on and is very pleasing to my eye. I love it when it's mistaken for a 1970 model.
I made some minor changes to mine which amount to chrome knobs, seat bolts and such, but I wouldn't change the profile one little bit. I bought it to ride and enjoy not to be constantly changing it into something else.
But it's a free country; to each his own.