STeven and I discussed this on the phone, so he already knows most of what I'll say but I suppose it's just another maker's POV so I'll tack it on.
First off, it's impossible to not hurt somebody's feelings at some point....
So if we're really talking about constructive criticism here....
I think the big issue is in the approach and the motivation behind it.
If a collector, other maker, etc. GENUINELY sees the potential there for something even better and is trying to bring that out, then I think it's great... even if it is hard to swallow at first.
As a maker, I think you're best off to TRY to listen... And process... And take it for what it's worth. Sometimes a guy just won't like your style, and that's okay... so long as he's not a dick about it.
STeven and I went round and round a few different times when we first started talking knives. Sometimes I come around to at least appreciate what he's saying (even if I don't agree), and sometimes I actually implement it.
I showed him one of my first integrals that was like 95% done and (this part is key)
ASKED HIM what he thought of it.
He said, "The handle is too long, but other than that I really like it."
I thought (and I think said out loud) "Fuq you, it is not."
But I took it home and started looking at it while setting on the kitchen table. Tried to take 29 steps back (not literally, lol)... and remove my personal feelings enough (you know, the ones that were built up over the 50 or so hours I had been working on the knife at that point!!!

) to look at the knife without bias. I realized he was right. The handle
was too long.
I gritted my teeth and ground it down (FRONT END) because it had a pommel and pommel nut on the butt end.
IT MADE IT BETTER!
STeven's intentions had come to fruition. He was not trying to hurt my feelings.... he saw something good that could be better.
So how do STeven and the rest of you do that with other makers? Beats me!!!
The ones that want to get better will take it for what it's worth. The ones that think they're already "all that" probably won't.
And worth noting... It is best (IMHO) to offer that type of constructive criticism only if it's asked for. Otherwise it's 99% likely you're going to hurt feelings.
I still take some of it awfully personal... but please keep in mind it can be very hard not to when you're showing someone something you've got dozens of hours and all sorts of blood, sweat, and tears poured into.
I'd also like to give Kudos to Eric here... He is hungry to keep improving and he sucks up constructive criticism like a sponge and is always seeking ways of getting better. Good on 'ya my friend.:thumbup: