I don't think my habits are quirky, as every one has a very good reason behind it.
Here are a few that dh thinks is weird . . . but I know most of you will understand!
I have my own tube of toothpaste. Reason - it grosses me out, to find the toothpaste left open . . . or worse, WET, under the cap!
I have my own set of tools. If you borrow them, you'd better ask first, return them CLEAN and to the exact spot you found them!
My clothes hamper is MINE. Put your dirty clothes into your own hamper . . . and you'd BETTER not hang your wet towel over mine!!!!!
I'm another, whose pillow is strictly off-limits to sharing and TP must roll off, from the top.