I'd love to have the ability create a wider range of player characters, and would certainly make good use of that. But perhaps for me an even greater advantage of more variety in body shapes would be to see more diversity in the NPCs. I think it looks just a bit weird and immersion breaking that everyone of the same sex/race is exactly the same shape or, in some cases now, one of just two shapes. Adding variety of body shapes to NPCs would make the world feel more real to me. And once it's done for NPCs, there's less of a stretch to add it for player characters too (though I accept there's probably still some extra work to do when it comes to the variety of equipment that needs to work with different models).
