"Opinions are like asshole- everyone has one and most of them stink" Take any 2 ppl to comment and you'll get 2 different answers I reciently learned when asking for crit of an image! Unfortunatly, this is not a science, so your opinion is no more valid then anyone elses. It's an art. Not being a science means there are no hard and fast rules and techniques that can be quantified and passed along to others. "Unless it's specifically noted in the description that they only want glowing praise, then they may recieve a comment. (obviously, I'll only comment as I feel appropriate)." This is playing with fire. But I'll grant you- it'll be entertaining to see how fast they lable you a troll, lol.