Quite frankly, I don't like playing as a masculine man-hero all the time.... and Shepard is as interesting as a caveman. =/
You know that you can change Shepard's face or even create a female Shepard, right?
Besides, Shepard is a fantastic character. I love "being him", he/she kicks ass, plain and simple. Feel sorry for the repaers because they will get pwned.
I think Dice was talking more about personality than raw appearances.
But that doesn't make much sense either. Granted in the end of game Shepard still kicked ass and took names, but along the way you could be diplomatic about it or you could kick guys out of space windows into space cities.
IMHO Shepard is more than just a badass, depending on how you went about it you could have some great conversations with a lot of characters.
I doubt Dice played it anyway. :)