What kind of weird quirks do you have that others might find to be irrational?
For me, it's probably the fact that I cannot stand to see a book getting damaged/destroyed/discarded. I don't know why, and I can't explain it, but I feel like I must save all the books. I've still got most of my childhood books, including school readers.
About five years ago my husband's grandfather fell too ill to stay at home (he was 98 years old) and so moved into a retirement home. When he did his three daughters (including my mother-in-law) cleaned the old house up to get it ready to sell. We went down there to help with some of the heavy moving, and as soon as I walked inside I almost cried: There was a huge pile of rubbish in the middle of the livingroom, and it was mostly books that they were just going to throw in the dump!
I threw myself on that pile and defended it like a mother lion defending her cubs. I would not let anybody near it until I went through it and saved every book that I could. And these weren't just any books. I'm talking several dozen books from the 1920's and 1930's in their original printings! The Great Gatsby! Scarface! A whole bunch of 90-100 year-old books that had survived for so long and were just going to be thrown in a dump!
Anyway, I saved them. I can't stand to see a book suffer, even if it isn't a book I'd read. I almost feel like books are living things.