Know Your Neighbors
Price and location aren't the only issues you need to consider when choosing an apartment -- you should also know who your neighbors are. Are they in your age range? Do they have kids?
You should take a close look at the people who populate your favorite few complexes and make sure the demographics are similar or at least compatible with your lifestyle. After all, you won't care how close to work you are if the constant college party next door prevents you from getting any sleep.