I am relatively new to the game, only a couple years in, and recently watched a few people at my local venue play with the Illuminati event dial. I had never heard of these, but the prospect was kind of interesting. Certainly something I wouldn't mind adding in to a game every now and again just to mix things up. I'm looking to try and procure some, through trading or other means eventually, so this brings me to my question!

What are your favorite event dials, and why? (If any?)

The LE Planet Hulk one is pretty fun but you have to build for it.

EDIT:
You know, I went back and looked at a few of these in the Units section and I can't remember which ones I've actually played aside from Timebomb. They can have the same issue that some Resources do and you forget to turn the dial when you meet the criteria to do so because you're engrossed in the game. That and some of the effects can throw a game off balance.

Still, it might be fun to dust one of them off and give it a go at some point.

I agree, Planet Hulk was a blast to play. It makes for a fun beat stick style game.

Unlimited Class Wrestling Federation was pretty cool, too.