Don’t equate thick pile with quality. Some of the highest quality rugs you’ll see will be quite thin. The key is understanding what kind of rug should go where. For instance, an expensive, thin-pile rug will suffer in a high-traffic area. Get a rug with some thick toughness if it’s going to need to stand up to consistent wear and tear.
If you aren’t sure which pile height is which, here is a helpful guide:
A rug with shorter pile will last longer than a rug with long pile. Why? Because short pile is both easier to vacuum and less susceptible to damage.