Pant fabrics tend to be 'quiet', as in basic neutrals that act as a background in your wardrobe, though current fashion trends show pants in brights and prints too. I look for pant fabrics with drape and character in black grays, browns, taupe, ecru and all shades of navy and blue as well as prints and colors that are the right weight and that match the season. One trick I learned from a color consultant is to match your pants to your hair color. Another is to chose warm tones or cool tones to harmonize with your own natural coloring. As a general rule, 2 1/2 yards is the magic amount to buy for a pant, more if you are tall, less if you are short. I love the presence of lycra in a pant fabric too, it adds to the drape and is more comfortable too. Usually the stretch is on the cross grain, but not always, so if the stretch is in the lengthwise direction, I cut the pant on the cross grain so the stretch goes around the body.