My legs lean toward muscular (as long as I stay active). I ran the Whidbey 1/2 marathon this spring which meant a lot of hill training and also continued Spin classes. My thighs got even more defined and I noticed my jeans fit tighter in the legs (even though I dropped about 7 lbs). Some women in Spin class asked if they needed to worry about their legs getting too muscular - I tried not to be offended. Overall, I prefer having defined thighs to less shapley legs.