I don't get sentimental or superstitious about them.
With that said, I stash arrows away like a packrat. I always have good plans for them when I put them into the arrow storage box, but they never seem to get used. I'd imagine I probably have a good 8 arrows that I killed deer with and I put in there with intentions of cleaning up and shooting again, it just never happens because I changed hunting arrows, etc. I normally have 2x dozen arrows going into hunting season so I don't really need to reuse then for the current season ever, and by the next season I'm using something different.
Below is a pic of my arrow stash from a few months ago. It holds 7 dozen arrows and as you can see it's overflowing. It's grown since then.......that's part of why I gave those arrows away in my game camera contest. I suppose someday I will go through these and sort out what to sell/throw away/keep.