It doesn't matter. Too many Ks are a bad thing, too little walks are a bad thing. More important is contact rate, which is how many times a guy Ks per at-bat. If a guy Ks 40 times in 160 ABs, which is 25%, that's not very good. When you get above that, it's pretty tough to project to be very good in the Bigs. Unless you have other ridiculous tools, like 50 homer power.
Walks are more important to me for lower average guys who don't make as much solid contact as others. Take Delmon Young, for example. Walks very little, but he's hitting .320 at AAA as a 20 year old. I'm not worried about his walk numbers in any way. A guy hitting .250 who walks rarely is a different story.
OF (x3): CarGo, M. Bourn, D. Jennings
UTIL (x2): E. Encarnacion, C. Hart
BN: Cuddyer, C. Ross, J. Montero
SP: Price, Gallardo, T. Hudson, Lester
RP: Chapman, Jansen, Rodney, Putz, Cishek, Bailey