Water usage is probably my biggest. Living in a high desert, my wife and MIL see no problem with filling one side of the sink with hot soapy water to wash a few dishes because “that’s just how I’ve always done it”, to watering the grass and plants for hours. All of this makes me mental.
Maybe more of an online/fandom type of nobody rather than IRL, but I LOVE Sonic The Hedgehog ( Sonic '06 ) so much despite all the glitches because I think the glitches add so much to the game. Cannot convince me that bug riddled mess isn’t a very beautiful sight to behold.