I'll start.
Here's mine, please listen while reading to the explanation. Gotta set the atmosphere....
I used to use a few different songs in my pro wrestling days and they all try to capture the persona you're shooting for. I eventually settled on this song when I realized my persona was really going to just be my martial arts self. How does this song capture that? From an emotional standpoint, this song does two things absolutely beautifully despite the paradox. Firstly, it projects calm. Second, anxiety. To me it seems that the song intends to lull you to acquiesce while hiding a deep ability for destruction.
How does that relate to me? In martial arts there is often a tendency to relate to a totem/animal/idea and use that to grow stronger. Living in a windswept, often cold region my martial arts concept is that of winter/cold/ice. I may not seem like I'm doing much actively to fight you, but trust me, I'm working my way in to chill your bones. Apart form martial arts, despite being a bit of a wiseacre here, I'm mostly quiet in person, choosing to listen.
To up the ante for wrasslin' I spliced in this quote. I altered the volume, put it in at random spaces and generally just made it creepy as all hell over the background music.