Robert Downey Jr. smiling

i love the reflexions and shading of the glasses , i love the ears and how you made the teeth , your technique is amazing , i love it i think im going to try it , this hashing with lines maks it easy and looks nice , however , i would like to criticize what might be there , like , amm idk , the facial hair from the chin it cant see it and amm at that same spot , it doesnt realy shape the shape , just look what a good inpression gives the whrincles and the nose , the ears and than , we have some shadow underneeth there some lines actualy , i can see it it is done fairly good but amm it could be better and u know it , another thing amm , yeah the shirt doesnt realy looks like a shirt , it seems more like a paper airplane . another thing very inportant i think , people always told me "dont waste the paper ! , your drawing finishez at the end of the shirt's neck . this is a critique so i tried to find flaws , but overall u have a gr8 technique , after all this time ive just found the flaw of the flaws , the right arm (left for him) the arm of the glasses is slightly down ( why is that , i realy wonder) oh and that right lens ( left for him) doesnt have any shadowing , - is this your work ? - hiding intentionatly flaws so we can discover it gradualy ? , anyway its realy nice good job and keep them coming pls