Texture

I've been listening to a movie on my headphones, and I've discovered something interesting. Either I'm going deaf or there are a lot more sounds than my television can pick up. I love the sound of a clock ticking. And this one is in a writer's study. She has a beautiful study, red sofas, built-in bookshelves, a collection of vintage typewriters around the room, a huge desk, a wall safe and a need for one :-), and that ticking clock.

It adds to the texture for me. How do you know when you've written too much texture (detail) into a scene, or hit just the right note?