I don't have a bag myself but my MIL did temporarily for just over a yr due to a perforation to her bowel from her diverticulosis and she absolutely hated it and couldn't wait for it to be gone...she had tons of issues with how it was attached and hated having to empty it soooooooooo often, she said it was uncomfortable, painful and constantly annoying, even woke her up alot at night because of the discomfort...everyone is different with how they feel about
wearing a bag...this would be a great Q to post over at the ostomy board, I'm sure some ostomy patients still lurk on the UC and CD forums from time to time but I'm sure you'll get plenty of responses over there, even considering many of them are quite happy with their bag and may not find the need to post as much I'm sure most still lurk to help out newbies.
BTW, your questions are not weird especially under the circumstances that a bag is a very likely option for many UCers.
My bum is broken....there's a big crack down the middle of it! LOL :)