Opening umbrellas in the rain.
One of my two biggest wishes for open world games is to have the main character open an umbrella when it rains, while in-game and not in a cutscene or whatever. Not just for fighting or floating or whatever, but because it's raining. I guess it's completely pointless and not worth implementing in any game, but I think it would be cool. I'm just gonna list games that come close to fulfilling my wish as I find them.
(The other wish is to have them cover bright sunlight with their hands, but I haven't seen that in a game yet.)