I don't know how this came up in my head, probably it's a mix of Beowulf influences and and angry neighbour that always complained about noise when I was playing with my friends as a children, but, in the campaign I'm running in Blackmoor right now, I added the extra flavour that Giants don't like noise: like you are riding on pebbles and making noise and a Giant (random monster encounter) shows up complaining you are making too much noise as he just wants to sleep and attacks you. In other occasions, if you make a loud noise enough, the Giant will walk away.

It is just a minor twist, adding some depth to a race otherwise a bit dull (it also explains why Giants like living in the wilderness, like passing their lives quietly and alone, etc.), but I noticed the players picked it up nicely and enjoyed this little detail.
What do you think?

Little things like this are what make the game/world/session come alive and be memorable.

In ten years, will the players talk about the knock-down drag-out fight of army against army and barely winning the day....? .... or will they remember the two giants that stomped out of the forests, shouting at the armies to "CUT OUT THAT RACKET, WE'RE TRYIN' TO SLEEP"..? :D