We already know Legion like to dance. It's probably not a stretch to think he eventually branches out from just doing the robot, right?
Here is Legion, dancing along to Anaconda thanks to Revolution72 Studios. Because butts, I guess?
Here is Legion's original dance:
And here's Anaconda, in case you wanted the full song:
If only the Legion version was longer!
[Mass Effect SFM] My Geth Consensus Don't [Revolution72 Studios]