My favorite thing to share on Google Maps are the experiences my wife and I have at unique restaurants, both local too us and around the world.
We love food, and finding places that can deliver a food experience that accommodates both our needs (My wife is a vegetarian and I am not) that are also delicious and unique is one of our favourite pastimes.
Sharing our experience with others on Google Maps, to help other diners choose restaurants that will deliver an excellent experience is one of the reasons I started becoming as active as I am in the guide program!