Plain and simple, a good fit should flatter your body. It will draw attention to the parts of you that you want and it can also minimize aspects you’re not as fond of (a large midsection, for example). Take the time to get to know your body, and have a tailor help you get accurate measurements. Learn to say “no” to clothes with a style you like, but a fit that can’t be adjusted to suit you. It really does matter.