He wants to win... AT ANY COST! I agree about mobility vs pocket passer, but how many of these QBs really are really willing to do what it takes to win.
Romo builds a lot of stats against inferior competition, but how many "big games" has he won??? This was the same QB that said "if this is the worst thing that happens to me in my life, I'll have had a good life" (or something to that effect) Can you imagine Staubavh or Aikman saying that? Troy was content to let Emmitt become the all-time leading rusher in the NFL in order to run the clock out and preserve a win. With Tony it's keep passing; I guess to pad his numbers.
I'm not saying that we need him more than Donald or some other player, but I think Manziel very different than a lot of QBs...