The return on investment for plumbing will vary from year to year and market to market. The importance of selecting faucet finish and style for your plumbing fixtures will add to your return on investment and increase your bottom line when it come times to sell your home.
As mentioned in my article about top 27 return on investments, updating plumbing depending on market can provide a 260% return on investment on average when selling a home.

Image Courtesy Moments Under Glass
Repairing dripping faucets, leaking pipes and updating plumbing fixtures will help the perceived value of your home for sale and prevent home buyers from asking for price reductions.
Bathroom trends will range from traditional to transitional that are minimalist in style. Good design is timeless.
Warm metal finishes on fixtures in burnished brass, copper, gold and oil rubbed bronze in smooth and satin sheens are making an up to date show in kitchens and baths.
Your faucet finish is an important feature when updating kitchen and bathroom. Before selecting the finish of your fixtures take the entire room into context and ask yourself if the finish will complement the whole room.
For the new home sellers who will be selecting finishes to update their kitchen and bathes make it easy on yourself by selecting your hardware, lighting and fixtures to match.
Selecting Faucet Finish and Style:
Matte Black: Eclectic and modern design

Image Courtesy Alan Mascord Design Associates
Brushed Nickel: Goes with all design styles
Chrome: Scandinavian and almost every design style
Copper: Farmhouse, Tuscan and Steampunk (gothic Victorian mixed with industrial revolution)

Image Courtesty Haco.com
Oil Rubbed Bronze: Cabin, Cottage, Old World, Rustic, Traditional, Tuscan, Mediterranean, Modern design

Image Courtesty Decor Ideas
Polished Brass: Vintage, modern, traditional and eclectic design (the polished brass below also comes in a satin brass, too).

Image Courtesy Euro Style Lighting
Polished Nickel: Contemporary, Eclectic, Elegant, Modern and Traditional design

Image Courtesty Linkez
Satin Brass: Traditional, modern and contemporary design
Satin Bronze: Eclectic, Mediterranean and Traditional design
White: Farmhouse and Modern Design faucet design like the faucet below.

Image Courtesty Red Egg Design
Mixing your finishes adds visual interest and dimension to a room and works as long as they blend together and your design is purposeful. If not done properly the eye has a natural tendency to notice the one thing that is different.
A faucet is the jewelry, sparkle and shine of a room the lipstick so to speak that adds visual appeal and the finishing touch to your room.