One of the things (among many) that drives Mr. Thipu nuts is the way I put the flatware in he drain basket. I like to put them working end up. To me that seems cleaner than putting them with the spoon bowls and the fork tines down. He prefers it the other way.
I have to have the spoons and forks up but the knives down, especially the sharp ones. Took me ages to train DH.
This is something that drove LDH nuts. I put the handles up, for safety . . . especially when the DDs were younger and started helping unload the DW. My other thought was you grab the handle end when unloading and don't touch the eating end.
It drove LDH up the wall when I put my used tea bag in the sink. On the weekends, after breakfast, dishes done, I loved me a few cups of tea to read the newspaper with. I'd use the same tea bag for 2-3 cups (I don't like strong tea.) He insisted that I put the tea bag on a saucer. I insisted that the sink was clean, why dirty another dish? (Once I was done with the tea-bag, I threw it away and re-washed the sink.)
Sigh. I remember these bickers with fondness.
I'm sending heart-felt smiles to all of you. Little things are what makes the world go-'round.
Cherish the simple conflicts, it's what makes you and your spouses work so well together as individuals.