What's the most petty/pointless/pedantic hill you're willing to die on?
For me, it may be that the toilet paper roll needs to have the open end away from the wall. I don't want to reach under the roll to take a piece! That's ludicrous!
That or my recent addiction to correcting people when they use "less" when they should use "fewer"
3 meals a day is completely unnecessary, and just eating one large meal works just as well. Saves time, too. I can sleep in because no breakfast to worry about cooking, lunch can be used to just relax or do something else, and then dinner is larger, but cooking more of the same food doesn't generally take that much longer.
I love OMaD, saves on cleanup, after I got used to it I just stopped feeling hungry most of the day. I feel less bogged down in the afternoon and I've lost a decent chunk of weight.