We considered SO looking being passive, while SO swinging [is] aggressive.
I consider passive decisions and aggressive decisions to be neutral. You want to be passive in certain situations (like the count is 2-0 and the pitcher hits the inside corner at your knees). You want to be aggressive in other situations.
What's important, IMO, is whether it's a good decision or bad decision. Called strike 3 is the same as a swinging strike 3 if the batter misses a pitch outside the strike zone.