I think the bigger point is being forgotten here. Your ears are the best judge in anything related to audio.
Technically, you would invert the polarity on the beater side, but artisically, you may find the hollow sound works out the best. And this goes for anything, snares, vocals, guitars, whatever.
With enough situational experience, you tend to get pretty good with it. Plus you tend to start gauging situations where you may or may not need other processing as well.
For example, I never gate on tracking, but light compression is not uncommon.
So to answer your question directly,
1)listen
2)analyze (understanding all the repercussions of those actions)
3)then apply