Great thread and some great posts!
Please allow me to let some of my pet peeves out for exercise in response!
In re: accepting criticism. If you post on an Internet forum, asking for a critique, you're going to get a *wide* variety of responses. Some will be well thought out and professional, essentially a free mini-clinic, some will be flat out wrong, some dangerous, some well meaning but no more knowledgable than the poster and some from completely outside your discipline. The value lies in sorting through them and figuring out what is valid and what works for you.
A lot of things influence my decision about whether to offer a critique - the first turn off is a subject line that says "Be kind!" or "Rip us apart!" if you're providing me with direction on how to critique before I look at the video or photo, I don't think this is going to end well. How 'bout I be honest and give you my professional opinion of both the good and the bad? Wouldn't that be more useful than either kindness or ripping?
If I read the thread and see that the OP is already responded defensively to other posters or is clearly only seeking "Attagirls!"' I stay away.
If the poster hasn't offered a decent photo or video, I don't bother.
If I offer a detailed critique, and the OP is argumentative, defensive or dismissive, I make a mental note to never offer critique to that person again.
BUT, if after the same detailed critique, the OP responds with "Can you explain more about that?" Or "Can you tell me what exactly you see that makes you say that?" Or "Can you tie that in to when my instructor says _________for me?" I know I have someone who genuinely wants to understand and improve and I will go out of my way to help them.
The very sad thing is that the defensive responses outnumber the appreciative and seeking to understand responses by a wide margin, which is why I critique less and less.
This is a multiple-discipline board, and that has its advantages and disadvantages - on the Hunter section, I always check myself before I respond and make sure the question is about USEF hunters, not breed show hunters, which I know little about. It's also always fun when someone asks a question about extended trot and 4 dressage riders post detailed (and technically correct) responses about how extension is developed out of collection and should not be attempted until a horse is working a certain way, never realizing theat the OP is not a dressage rider and is using their discipline's term for lengthened trot.
Don't even get me started on the threads about collection !!!!!!!
However, even in those cross-discipline train wrecks, there are often really great nuggets of training advice that are applicable to all disciplines if one is open to them. It's a shame if posters have the attitude that "I ride x discipline, and I really think those y discipline horses move funny, so that y discipline trainer can't possibly have any advice that would work for me." If you are open to other disciplines, and seek to understand the goals and merits of them, then you can take those training techniques and adapt them and have another tool for your toolbox in your discipline. In this way, dressage and galloping racehorses made me a better hunt seat rider and trainer.
Okay, rounding up my peeves and putting them back in the corral for the time being!