What is your most disliked human habit? Mine is somebody sitting near me in a restaurant with their fist in their mouth picking their teeth...Yuk... Have you any bad habits?..x
Men in pub loos, just for you ladies - more than half don't wash their hands even when they're drunk and have pee'd on their hands, and some don't bother even after they had number 2s, straight from the cubicle back into the bar.
Mine is people who blow their noses in public. Even worse is people who peep into their hankie afterwardds - what do you think you're going to find - pound coins! I also hate people who use paper napkins in restaurants as hankies, and then put them on the plate at the end of the meal - disgusting!
In answer to the second part of your question - yes I have, but I indulge them in private, so I can't talk about them on here, which would defeat the object.