Auto Insert close tag
When I type <p> and it automatically inserts </p> .... I find that strangely annoying...
Probably because that is only helpful if you write in a linear manner, from beginning to end... and I rarely do that.
I spend more time editing any file than I do writing it the first time.
So -- to turn off that behavior:
Tools | Options | Text Editor | HTML | Formatting
"Automatic formatting options"
"Auto Insert close tag" ← uncheck that!!