Hey Vlad

Overall, its real neat. For me, as you've pointed out already the legs need more work. The calves look to high and the butt/thighs is like Arnold Schwarzeneggers 'in his day'. If the chest was built the same ie: bulky, then it would look right and in proportion, also the front of the quads looks a little too tapered into the knees but other than that all is good

Cheers
Jay