You really have a fantastic style going here. I say that knowing that an artist should go wherever their interests take them, so I won't say 'stick with this', but I will say that is it beautiful and stunning. Looking at it close up, I almost feel like I'm looking at topography or a city scape inside the face portion, it's so detailed, and chaotic and just overall gorgeous.
The one and only critique I have is that the angle of the eyes compared to the nose and mouth seems a bit off. The nose and mouth seems more like it's facing more towards the left, while the eyes seem straight on but looking towards the left.
The last thing isn't a critique as much as a challenge- I see a lot of your latest work is a lot of portraiture, when you really have done a lot of beautiful full body work as well. I want to challenge you to do some more full body artwork, perhaps with more than one figure.