|I know he's not a highlander but he's got a sword. That's almost good enough, right?|
I'm torn between two systems: Either d10 against a static modifier, or d10 against the GM's d10, with opportunities to roll again or whatever. All other things being equal, which would you prefer?
The first one is the way it's been done for ages. There are a bunch of tables saying how difficult a thing is, and you look at it, and then you roll and try to roll better than it. It's kind of mechanical, and actually requires nearly as much GM fiat as the dude making it up on the spot. It's just better hidden. It's easy to understand, and lets you play percentage games when you want to.
The second way is what I'm trying to do in The Odds Are Against You, because I'm using cards and you can play your high card when it's an important moment and your low one when you want to save your high cards for later. You, basically, get to choose your own odds. If you want to be sure to win, play a 10. If you'd like relative certainty, play a 7 (you have a 70% chance of winning the card flip.) It reverses the roles a little, which is kind of what I'm after.
But which do you think would be more fun?