Which demo reel music?
 

After watching countless demo reels to get inspiration for my own I'm stuck at a very strange juncture. What do I cut the demo reel to? I tried a non-obtrusive techno track available licence-free but it just doesn't have the same oomph to it. So am wondering whether there's an unsaid rule to cutting demo reels to a certain kind of music.

What did you use for yours? And why?