Do you mark your records?

I write something on the cover, like S2-1-drums. Side2, Track1 with a open drumbreak.

My battle record collection are marked up, stickered up, beaten and abused on a daily bases, there specially made for the abuse taken by us needle thrashers. The only care they receive is a good cleaning before another dose of abusing.

My personal record collection is a different matter, no stickers, markers, nothing is written on the covers or vinyl labels, got a lot of love for my personal collection. Don't need to mark them as I know what is where etc.