Ok, so I listened to the episode. (Gasp! They jumped the queue?!)
No love for 3d6? Added together? (Yeah, I started with TFT and played a lot of Champions/Hero system.)
With 1 dice, you get a uniform probability. With 2, you get sort of a degenerate, triangular distribution. With 3, you get a fully formed normal distribution. 10 or less is 50%, 14 or less is about 90%, 3 and 18 are really unlikely, and modifiers are interesting: +1 goes from 26% to nearly 40% or 50% to 62%, or 90% to 95%---it goes from really useful to not that great depending on where you start.