What
Argent Stonecutter mentioned exactly.
I felt much more unique pre-mesh. My furry back then was pretty much my creation. I modded the hell out of it, swapped textures between parts easily, placed different avatars together, to get my unique looks.
Now, if I went back to furry, in order for me to feel unique I have to commission a custom mod. Which, I don't mind, but the fun of modding it myself isn't too much there anymore. Everything is now mesh and appliers. I could teach myself, but...eh.
Same goes with human avatars. I always made androgynous male avatars and that was so much easier pre-mesh body and clothing. I don't like a lot of the effeminate options, especially heads.