The best Valentine's celebration was enforced on us by our oldest son a few years ago. He made us get a nice take out and then set up the coffee table like a mini dining table and banned his bruvs from the living room, got out and lit candles, sorted out a DVD we would both enjoy whilst munching our treat and then did all the clearing up.
The worst one was the first one after we got married, dh lavished me with gifts, cards etc, I had completely dismissed the thought of Valentine's and was left feeling really guilty.
(We get one another little treats now and go out for a romantic meal and a nice long walk one lunchtime, sometime that week)
Mothers day I love hand made cards, they play along still but need nudging by dh.
Birthday I am really not bothered about fripperies but I play along for their sake, I choose a day out for the family that is biased towards my likes for a change.