Urban Sketching - Is Watercolor a Good Idea?

Urban sketching is a very basic art form that's always been practised. But i think the way it's popular now is a very modern thing, because a lot of people feel jaded from photographs and over exposure to perfect art. So there's this appreciation for something that's clearly handmade on the spot, on location,. And representing the mood and the feelings of that time and place. I'm definitely like, ah, you know, i can tell it, i could take it down a notch if i need to.