when something is expensive, we say it looks fancy or luxurious wow, you look very fancy, it means you wear very expensive cloth that hotel is luxurious, or very expensive while precious is very valuable, for example good friendship is very precious relation also, your sentence; (he looks rich) is OK and used someone looks rich; dressed in expensive cloth, uses expensive perfume and so on ......

just live an ordinary life.because simplicity is better and high your moral.don't be showoff.

The word for this in Canada and the USA would be "stylish"

I'm not sure but "precious" seems a better word for me...