When selecting and setting up a room for your home studio, your goal should be to use a room that's as neutral as possible. When recording, you want what you record to be the best representation of what is being played. That being said, you also want a room that's accurate when you're mixing and listening. A room that's neutral is very important. You want to minimize recording the room itself, and when you're mixing, you don't want to be mixing to compensate for the room. Many times, with poor acoustics, you'll get a lot of reflections in your recording that distract from the material at hand. This isn't always a bad thing; sometimes, when recording drums or other "large" sounding instruments, adding a little bit of "air" is a good thing. However, it's not always preferable -- especially with vocals and acoustic instruments. A room with carpeting is your best bet; if you have hardwood floors, you'll want to add rugs or car...