I like Rock the Castrum too, along with a lot of the achievements like I Like Big Fish and I Cannot Lie and most of the relic ones.

Honestly though, most of the wordplay goes way over my head (or at best provokes hours of late night discussion in my FC about what on earth something is meant to reference). I'm especially not a huge fan of pop culture references as 99% of these pass me by, but It's Not Lupus (FATE name) got a lot of laughs in my group. Fifty Shades of Yellow is good too for how appropriately it matches the quest, even if the quest itself is annoying.