From my point of view, and what I've seen a lot when searching the "What to do, and what not to do" skit thread: It's something everyone can understand. I mean, without so many "inside jokes" between friends or from the fandom you're doing the skit on. Also, it'd be better to not over-do the joke you mention. Or it'll just lose that spark.
-Holiday Matsuri 2014
-Mega-con 2015 (maybe)
-Joker (Black Butler)
-Jack Vessalius (Pandora Hearts)
-Julius Monrey (Alice in the Country of Hearts)
-Aura Blackquill (Ace Attorney)