I was thinking one or nine -- I'm somehow surprised that ten are so popular? but I also really like them so I guess that makes sense! I don't plan to change as I plan, but... these things do happen!
Probably 6 with eyelashes, because I have fairly drowsy-looking eyes in real life, and I like playing as myself. But 10 and 13 are tempting as well because they're just adorable.
I'm probably going to go for 1 or 10! 1 has be my go-to since the start, but after mocking up a few character designs, I think 10 will look best with the new round nose!
In New Leaf I answered honestly to the questions Rover asked at the beginning of the game and got 1 with eyelashes, so I've always stuck with those (in NL and Pocket Camp). I think I want to change it up in New Horizons though. I use to really want 7 with eyelashes, but now I am seriously considering 3 with the bottom eyelashes. Once I choose eyes I don't think I would want to change them (even if its possible).