Oh I love Gackt!! He's so pretty! Great job, I love realism, I trickled in it for a little bit then stopped. this is fantastic. I just think maybe more detail in the hair, his face is so beautiful and perfect, but then the simplicity of his hair reminds me of anime. Its Gackt as an anime character! <3 Its amazing though, the shading is perfect!
I think its really cool how you've allowed yourself to have a variety of art styles! You can go from manga to something really realistic like this! Very impressive! The hair flows so nicely, and I really like the way you shaded it. I also love his expression. It looks so calm and content. The angle is really really cool too. Fantastic work!