I've basically tried to keep the mods at the same height so that you don't get any unnecessary "collisions" with the figures during the game. I know it doesn't make for a lot of differences, but I tried changing other things (skin tone, makeup, face mods, etc.) so it does give you some distinct differences. I can only do so much without doing a lot more work. (Not really into doing a lot of 3D stuff.)
I'm also making all my mods without pubic hair, so I can use the smaller bikinis and underwear.
Oncesailor