My previous sessions are discussed here.
When I pick sessions for a convention, I look for 1) a system I have never played, or 2) a system I like with an interesting hook for the session. If one of the players or GM is someone I know, all the better. In this case, Savage Worlds is my comfort food. A friend of mine turned me on to the system about 12 years ago and I have run campaigns in it ever since. It was a game changer for me, since it handled large combats smoothly and had some interesting takes on character creation, support characters contributing to combat, and an initiative system I fell in love with.