When I was flying HAV to LAX, they had stickers for all the seats, which they affixed to slips of paper with the airline logo. It looked terribly unofficial, but I kept it as a novelty item. They also simply wrote LAX (and nothing else) on a generic tag with a string.

I seem to remember that older boarding cards had designs on them, as a background behind the information. Are those the world tail designs? If so, I also like them...

On BA Comair flights, I often receive a plain "boarding pass" with no special BA logo or anything. Just a generic card that all the airlines maybe use.