I love my gray sweater because a) it fits perfectly and b) it goes with everything. Sure, black sweaters are versatile, too, however, wearing them with pastels can look wannabe-edgy. Sweaters/cardis have a super wide price range. Don’t buy something junky, but don’t buy one that’s so expensive that you’ll feel guilty afterwards.
How to Wear: Girlie
How to Wear: Everyday
BTW, These are just ideas. A gray sweater can go with anything.