I have two sentences that differ only by one word.

1. The sound of it drones. It’s like a stuck record. The ear **demands** some variety.
2. The sound of it drones. It's like a stuck record. The ear **wants** some variety

The first sentence sounds much more vivid to me. I can imagine a person demanding something. I see a man grabbing another by the collar, pinning him against the wall, and *demanding* money. 

I can't see someone *wanting* something in that same way. It's just not as visual of a verb. 

I'm trying to pull some sort of rule out of this example that will help me improve my writing, but i can't figure out what the rule would be.

Both of these are verbs, and both of them are action verbs. So if I were trying to explain it to someone, how would I phrase a principle that would help them pick a more vivid verb when writing a sentence?

Thanks!