I get a lot of pleasure watching other people work. It's most of the fun for me. I pick everything apart, it's what I do. What goes on in my head stays in my head and I am entitled to my thoughts, even the judgemental ones. As ,long as I keep it to myself, no harm no foul. Everyone judges. If they say they don't they are lying to themselves. It's all OK, it's a reflex mechanism, not a choice. That's said, I relish watching a great drummer at work. The not so good drummers provide a list of stuff to NOT do. So there's a takeaway too. It's all good, especially the judging!