Why are we attacking OP? It's a legitimate question. Let's have a discussion. In our experiences, football is more about aggressiveness or toughness than anything else. If you don't have the necessary mental makeup, then you have nothing. Is that the same with soccer? Probably not to the same extent.
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For example:
-running back A (6'0 200, 4.6 40 yd -- soft as ****)
-running back B (5'7 165 4.9 40 yd -- tough as nails)
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Not only would running back B massively surpass A in effectiveness, but A would probably quit football. Now, assuming everyone has the same level or at least an acceptable level of toughness: level of skill varies between positions. In fact, many teams, mainly for conditioning purposes, like to label their players with one of three categories. For example, Skill (RB, QB, WR, DB), Big Skill (TE, LB, DE), and Big (OL, DT).
Big's get a bad rap for not being skilled, but that couldn't be more false. Anyone care to talk about skill sets for offensive linemen?