Been watching your various concepts and WiP pics with interest. It's nice to finally see the finished pic and it was definitely worth the wait. The landscape itself is stunning, I love the glowing patches of foliage and the sheer amount of detail in the grasses and the flowers. It definitely looks alien with a nice touch of fantasy to it.
As for the character herself, a lot of Twilek pics going around on dA and online in general but I think this one is one of the best I've seen. Her outfit is stunning, some great details like the ribbing on her trousers, the hairs on the back of her cloak and the patterning on her bra. The shading is excellent and I think the tattoos are a nice touch.
Finally just like to add that I like the nice touch with the glowing rings around her hand while she is using her powers. It reminds me a little of KotOR when using the ancient technology.
In all honesty, there's not really anything I can say I find wrong with the picture.
And as I spam you with more faves and comments, I find out more and more that I have a LOT of top fave pieces in your gallery. I thought that other Sith was awesome...but this is awesome too! Dang. Now I'll never be able to decide which one I like more.
What I really like about your Star Wars characters is your touch of fantasy on them. Sorcery..? That's pretty awesome, something new that people aren't really doing around these parts. I dig.