There are a lot of factors to consider when choosing your
bathroom faucet. First, determine the configuration of bathroom sink the faucet will serve. For example, a vessel sink will require a single handle tall faucet that will give you the right clearance. Under-mount sinks can use a short faucet either single handle or wide spread. The hole configuration on your counter top will determine the type of bathroom faucet. The most common types are 1 hole, 3 holes 4" apart, or 3 holes 8" (also known as widespread).
Certainly you'll want a style of bathroom faucet that suits your decor. Choose single handle minimalist styles for modern/contemporary bathrooms. Make sure to match the finish of all your faucets in the areas of the sink, shower, tub, and bidet if applicable.