
First off, I think the whole Trait idea is a really novel idea that could be expanded and enriched to really give this game something I don't think any other football simulation is doing, and allows another avenue to reflect real life football more accurately.
* CLUTCH - Brady
* CHOKER - Manning
and, taking this initial idea a step further -
* PLAYOFF PERFORMER - give this to your Joe Montana simulation, or maybe Larry Fitzgerald when you run your 2008 NFL season
I can't take credit for this last one, from Tigerman -
* LONGSNAPPER - a center or tight end who excels at long snaps. All teams have one in the NFL.