Miss Sis's post got me to thinking more about what I'd already been thinking. Going leashless improved my surfing exponentially. I've learned how to control my board and kick-out and I have a greater comfort in crowds because going leashless has made me more confident in my abilities.
I have another girlfriend who went leashless this year and you can see the difference in how she relates to the wave -- she looks comfortable and in trim. She's finishing her waves instead of hopping off the board. She is leaps and bounds better than some of the other people who have been surfing alongside her for the same amount of time.
As for me, it doesn't even occur to me to put on a leash if it's waist-high (chest-high if there is shape). It's a little weird when surf buddies greet me on the way down to the water with, "No leash?" I take a look at the easy waves and wonder if they even see the same thing I do.
Put me firmly in the "leashes suck" camp. I mean, how could I even consider doing a coffin-reverse coffin if I was tied down with a leash?