Hiya, I like the details on this one - I feel like you did a good job of rendering out the nose especially! I think your skills with detail might be leading you to copy shadows/detail exactly as you see it rather than focusing on mapping out the shadows in a way that creates likeness and form. I'm guessing that the reference you're using doesn't have a lot of strong lighting but it might be worth exaggerating the shadows a bit to create form and create interesting shapes rather than copying exactly what you see. I mainly just moved the right eye down and shaved off some of the jaw on the left side which fixes some perspective problems. Then I tried to only use dark darks in areas that won't receive a lot of light (i.e. the inner eye socket) rather than using them to show details (I removed a lot of the lower eyelid details as the lower eyelid tends to get a lot more light than the upper eyelid/eyelashes). It probably strays from your reference but helps make it look a little more 3D. I hope some of that is helpful. In terms of celebrity, I thought maybe Natalie Portman, but mine ended up looking like Emilia Clarke haha.