I'd like more slider options on sizes for all Sims. But i still wouldnt make too skinny or too overly endowed female sims. I prefer my sims to look natural and like any normal female. In my heyday (im 37 now) i was a size 10(UK) and a 34 F. But now after 3 kids and so many years older im much more curvier (im being polite to myself!) and will never see a size 10 again! In an ideal Sim game id like to be able to change body shape throughout the Sims life span, as very few of us retain our late teenage/early 20's shape. But i doubt that will ever happen.
Im still playing Sims2 and dont have Sims 3 yet (need new p.c) and was looking forward to the new slider options for bodyshapes but there seems to be alot of disappointment with it! But ill wait til i get the game (if i do...undecided still) to see what i think.