Solids are easier and faster to sew than plaids. An even plaid are easier to sew than an uneven one. One of the most important factors is the grain of the fabric. I suggest checking this before purchasing. If the lengthwise and crosswise threads are not perpendicular, the garment will not hang correctly.
Some fabrics are extremely difficult to straighten the grain.
You can eliminate alot of frustration by evaluating this before your purchase. Ask the clerk to pull a thread at the end of the fabric so that you can clearly see the location of the crosswise grain. Roll off one yard of fabric. Holding the fabric up, fold it in half along the lengthwise grain so that the selvages are even. Hold the fabric so that the foldline and selvages are parallel to the floor.