You know, the music in Sonic games really is amazing. I've also noticed that it seems to be easier for me to concentrate with a Sonic OST in the background. Especially the Unleashed level themes. The day stage music makes me want to move about and is a great energy boost, night stage music is slower paced but still works wonders. Both help me concentrate when I supposed to be working on something.
Legit, I sometimes just turn on the Unleashed OST for background music when I’m at work. Helps me work faster!