That is just incredible. Your shading and the way you have done his fur piece of clothing (I'm not sure what to call it) is exceptional. Any critiques? Well I suppose the background could do with a bit more detail and it might just be me but his forehead seems just a little too big, but this is just nit-picking. Really great work, I'm really looking forward to seeing more of your art. 
Yes, the background needs way more detail. You were right about his head too--it's tilted downward a bit but he was looking like a Conehead. Noticed his eyes were also off kilter.
I made some changes:

I think it looks much better now, but I'm still not really "done." I guess I never really will be, since every time I think I am, I see things I want to change no matter what I do. I've also got a sketch in the works that may or may not be painted. More Solas.
I'd like to try my hand at Vivienne, but her outfits are soooo complicated, and I'm horrible with anatomy... Still, she's cool and I love that bird outfit she's got.
Edit: Just noticed, anyone else think that his left eye (the one to the viewer's right, sorry...) is just a little too high still? I lowered it quite a bit, but it still feels off to me... I also think his chin is too square/strong, but that's going to be a harder problem to fix.