Back in high school, I went through a long phase where every one of my fantasy games, regardless of system or group — featured a halfling with a (bad) French accent.
Why? I’m not really sure. Halflings are fun to play, and I do love a bad French accent. And my players always seemed to enjoy them. But I’m not the only GM who does this by far, so I think there’s more to it than that.
Do you have cross-game, cross-group or even cross-genre NPCs like this? Why do you use them — and how have your players responded to them?