Update: My 1st Commission

First off, unfortunately my posts aren't going to be as regular as they have been in the past. There is just so much going on with moving and starting fresh in Connecticut right now. The big thing is that my art supplies are in storage because we haven't closed on the house yet. I'm keeping my fingers crossed that I will get them back sooner or later. For now I have a sketchbook, pencils, colored pencils, and some markers.
I'm currently attempting to work on a commission for a friend. This is my first "real" commission. I've drawn/painted things for people before but not with any real guidelines. My client asked if I could draw a man looking at a tree with a woman whispering in his ear. The woman has a ghostly type of aura to her, it all seems very romantic to me.
Here is my rough sketch so far

It's very rough and messy right now, but this is the first part of the process where I lay out the idea and work out the proportions and background. Her hands are driving me kind of insane. I'm pretty sure you can see where I've erased/redrawn/erased/redrawn. That's an issue I've always had, not enough confidence in my lines to keep them steady. 

So far the drawing is starting to take on a mysterious/romantic quality, I'm a fan. I'm trying to decide whether this should be finished in color or restricted to black and white.

I have to say that a large part of my process is the music that I listen to. I tend not to listen to a lot of pop/rock type stuff when I work, it messes with my concentration. Currently, my favorite album to listen to while creating is Angelmilk by Telepopmusik. Do you listen to music while being creative?