I also really like to have my discs in a specific order in my bag. Helps me to, at a glance, see if I'm missing something (I still leave discs behind... getting better).
I do this too actually. Putters closest to me, then mid ranges. Fairways farthest away. Right now I think it goes Pures, Buzzzes, Flying Squirrel, Leopards, Eagle If I know where everything is when I put it back in the bag, then I can grab the disc I want by feel while I walk to the next spot.