Shower faucets come in two main categories. The first is a dedicated shower faucet, and the second is a shower/tub combination. If you're looking for a replacement faucet, this decision is already made for you. Even if you are totally remodeling your bathroom, whether or not you have a dedicated shower will probably be determined by space considerations.
If you are replacing an existing faucet the question of one handle or two is already decided for you. One handle designs are the most popular. They allow better control of the water temperature, particularly once you're in the shower. If you have a retro look in your bathroom, two handles might fit in better.

A shower faucet is one place where you don't want to skimp. The labor costs associated with installing or replacing a shower faucet can be more than the faucet itself. Look for one that has a guarantee of long life. The longest lasting faucets are made of brass, with a ceramic valve.
One of the major determinants of how long a shower faucet will last is the quality of the valve. Standard rubber washers will wear out over time, creating leaks. Higher-quality faucets come with ceramic disk or cartridge valves. Ceramic disk valves are the most durable and also the most expensive.
It's a good idea to install an anti-scald valve, to protect you and your family from sudden, freezing cold or scalding hot water when someone flushes the toilet. These are now required by many municipalities.
The best faucets are going to be made of brass internals with a variety of finishes available for the surface. You have several choices when it comes to the type of finish you get for your shower faucet.
Chrome finishes are popular due to the shiny, like new look while being less expensive than other finishes. They can be more work to keep clean, particularly in a shower, and not as durable as a brass finish. Chrome is also available in a softer brushed look. Keep in mind that if you live in an area with hard water, you will have to deal with - and clean - residue left from the minerals in the water. Chrome is particularly susceptible to these marks.
Shower faucets like Delta Shower faucets, Kohler shower faucets and other tub and shower faucets are excellent both in 2 handle form and regular screw away form. Brands like Pegasus, Grohe and Price Pfister are some of the best producers of this item.
Nickel is known for its softer, satin look. It also looks good brushed. Nickel is durable and easy to clean. Choosing a nickel faucet treated with titanium will better resist scratching and tarnish.

Brass is popular for its high-gloss golden hue. It gives a very traditional look to your bathroom. Brushed brass provides a softer, more subtle appearance. Brass is very durable, resisting damage and wear.
Then there is the fun part – picking a style that suits your taste and your decor. You can buy shower faucets in traditional contemporary styles or you can be a bit more adventuresome and go for Art Deco, Elizabethan, or Italian styled faucets.
One tip – always check the manufacturers' specifications to see exactly what's included with your shower faucet. Ensure that at least the finish - if not the whole faucet, has a lifetime guarantee.