- intensity -- how strong is the pleasure?
- duration -- how long will it last?
- certainty -- how likely to occur?
- (time) distance(s) -- how soon?
- purity -- balance pleasure/pain?
- extent -- which people are affected?
human(s)
/ 
/ challenge(s)
/ hedonic calculus / [pedia]
/ play
/ casual
/ flower
/ story
/ game(s)
/ wave(s)
/ cycle(s)
