I just wanted to add a little more.
For example, here's my power HB:
http://goallineblitz.com/game/player.pl?player_id=2223756I want him to be a between-the-tackles bruiser, someone whose number I can call without hesitation in short-yardage situations. I started by taking his strength up to the 7th cap, and I'm now pushing his speed upward, and am beyond the 1st cap at this time. Multi-training agility, carrying, stamina, and vision. Same EQ and SA distribution as your guy, too.
His stats aren't nearly as gaudy as my MVP elusive HB on the same squad, but here's a Season 19 stat I'm proud of: 349 carries, 1 TFL.