I used to comment all the time at the bookstudy. My bookstudy group was full of half comatose people so it was left to about 3 of us to keep the meeting ticking over.
As for the KH meetings, that would depend on what mood I was in on the day. It was usually one of three moods:
1. Spiritual mood. Very rare. Well prepared WT with lots of show off answers. I even explained the 607 - 1914 mathematics once.. Got lots of pats on the back after the meeting for that one!
2. bored rebellious mood. Quite common. No comments at all, or the obligatory last paragraph answer. Or even better, the recap questions from the box. Easy to repeat what someone else said ten minutes earlier.
3. Mischeivous mood. This was my fave. My friend and I would play a game. Its like the FS game, where just before someone answers the door your FS partner gives you a word to use in your presentation. My friend and I would sit next to each other and when one of us put our hand up to comment, the other would quickly scribble a word on their WT and the other would have to use this word in their comment. It would start of quite easy, with usual JW terms to incorporate, but then it got ridiculous. we would scribble really obscure words and by the time the mic arrived we would be laughing that much we could hardly get our comment out!
I really miss that actually!
We all make a mess of our lives from time to time
It's part of the process that you stumble as you climb