I think I might just be genetically indisposed to trousers. The only pair I've ever had which have suited me have been a ridiculously cheap pair of paper bag waist 7/8 trousers from Tesco, of all places.
I'm 5'3 and a fat-thin 8, and all my weight is carried on my thighs. I have a tiny waist and not much bust, my arse is alright but I have the thighs of an East German field athlete.