Vote: RCA ANT1050 Digital Flat Passive Ultra-Slim-Profile Antenna

Why: This is the Occam's Razor of HD Antennas. It's simple design is slim, slick, easy to hide and passive, so it requires no external power. Doesn't work in all areas, but if you live near a city, chances are this is all the antenna you need. And at just over ten bucks, it makes sense to try before spending any more on expensive antennas. I actually tried several other amplified antennas costing upwards of $100 and many of them actually performed worse than the RCA 1050.