My teeth were not at a level that required correction by anyone's standards, but I was worried because my front teeth were wide apart, the top and bottom were asymmetrical, and the bottom teeth were supposed to be inward rather than the top teeth, but they were sticking out, so I had them corrected for a year and a half from the age of 19 to 21, when I was a senior in high school (currently 24),
and I suffer from rhinitis. It's so bad that I've come back now, but I still don't regret it and it's a good thing I did! It's much better than before!