One of the downsides of the min/max philosophy is that games often push people toward it by design. I hate D&D's combat, for instance (it's well done from a design sense, but it puts me to sleep), and I do anything I can to get through combat in as few rounds as possible.

It cheeses off my fellow players, because they assume I'm doing it to show off, but it simply appeals to me more to move past combat quickly. Unfortunately, D&D has no (universal) option to have very quick combats with meaningful consequences (since it's basically designed around wars of attrition as of 5e), so the min-maxed characters tend to just be the flat best in terms of combat. I'm the sort of person who plays video games I'm perfectly fine at on "story" difficulty to get past challenges that don't interest me.

I like 13th Age, but nobody will play it with me.