Obnoxious/ Aggressive/ Ruthless/ Selfish

A conversation about entrepreneurship and the basic qualities that entrepreneurs possess got me thinking ...

"Obnoxious aggressive behavior is essential to a successful entrepreneur. Obnoxious-aggressive is a type neither hosted, nor appreciated, in south Europe, India, and SE Asia. This makes good sense to me: entrepreneurship is fundamentally disruptive. Disruption disturbs harmony, which is greatly valued in southern Europe and India."

Isn't aggression too strong a term to use? Does aggression have a positive connotation? Selfish and ruthless .. yes .. and maybe the aggression is the kind that works towards something positive ..