I like a definition in the tune of "good or bad person is known for 'what s/he does' (in public arena) very often". In Buddhist teaching (really) there are 'kusala' (skilful/beautiful/meritorious) things (deeds/speeches/intentions) and 'akusala' things which are not 'kusala'.
(Most) People are/have/do some kusala and some akusala things. Many aim/strive/try to be/have/do kusala things, Many don't care or have other goals in life. These other goals are 'more important' to them than being/having/doing 'good' or 'bad' things.
If good/bad depends on which camp we go to open 'our spiritual' faces and to kneel down for judgement, we will have to wait for 'the Day'.