I know I am a few days late here, but I have just seen this and am compelled to reply.
Ann is 100 % on, with the pockets on jeans = smaller bum. Small low pockets are best for dimishing the botbot. Bootcut are best for shorter people & hiding sadle bags, as they lengthen the leg.
This season if you can afford it go for a nice indigo straight cut from 7forallmankind or a boyfit ( for girls) from Replay. Best highstreet alternatives are new look, or nouveux regardez as I like to call it.