As Fallen Muse said - big fan of combinations of both electric and acoustic elements. Not an easy feat to make things fit together properly, but when it works it sounds great. Really livens up the sound-space when you can borrow from two very different core sounds.
I think Waking Up in My Head is a great track to kick off the OST - orchestration and arrangement is well done and the percussion is nice and selective to drive the rhythm forward. I really like the string runs that kick in around the 40 second mark.
Good work! Best of luck in the jam. :)