I'm not sure when it started but me and DH only buy 'proper' cards for birthdays.
The rest of the time we play The Crappiest Card game. It's exactly what it says and you have to find the worst card possible, the more nauseating/odd/slightly disturbing the better. Whoever manages it wins. I'm pretty confident of being today's winner.
However, he had a moan at me yesterday as apparently I don't take anniversaries seriously enough because I couldn't name the specific date our drunken meeting was. Wedding anniversary should also require a sensible card. Although, I pointed out he bought me a vile one last year. But it had Happy Anniversary on it, so apparently that's ok. 
Also, last year I definately won, him bitter got him a card for our anniversary with meercats on the front as he's always head up like a meercat being nosy. I even drew speech bubbles on it. It's not like I hadn't put any effort into it. But he reckoned it wasn't a 'proper' anniversary card.
Now he thinks we should get serious anniversary cards too, but I like the Crappiest Card game and I don't want to.
Who is BU? Me or DH?
Disclaimer - this is a lighthearted threat, not serious. Although I may tweak his nipples in a fit of petulence if I am found to be unreasonable.