Something that makes me feel like I earned the result. My personal favorite games are systemic and my own non-jam projects all have systemic design, which unfortunately means their scope is quite high D:
Does it work better when there's competition with other players? For example, I find myself way more stimulated when my score (or time, etc) is in a leaderboard with others. I used to think about it as a rule, but now I see it really depends on the personality of your players.
