Too much of a good thing.
I think the best general rule is not to use more vb commands than actual text and don’t make them overlap or pile on and try not to repeat them too much. They should be a fun addition to your passion, not a crutch. If you looked at your chat and removed them would it still make sense and be sexy?
Another good rule is not to use them out loud when there are other people in the room. You can whisper them though. I didn’t realize that only the person you’re whispering to can hear it for a while either. So enjoy your vb but do it in proportion.