I know this feeling all too well. Except I don't want my family to tell me what I'm doing wrong, because all they do is try and make me draw in THEIR style. So I try to have strangers on the interwebs do it, BUT NONE OF THEM SEEM TO SAY A SINGLE THING ABOUT THE ARTWORKS FLAWS.
HOLY MOTHER OF GOD IT ANNOYS ME TO BITS.
CAN SOMEONE JUST TELL ME ONE THING I DID WRONG THAT ISN'T ABSOLUTELY RETARDED LIKE "You made a small mark right there, next to the foot." or "You didn't draw this anatomically correct. It's wrong, and you need to fix it."