What should I look for in a quality hammer?

The head is what matters most. Look for one-piece construction where the head and handle are forged together, or at minimum a securely wedged design. Cast heads are cheaper but more prone to chipping. Weight-wise, 16 oz is standard for general work, but go lighter (8-12 oz) if you're doing detail work or heavier (20+ oz) for framing. The face should be flat and smooth, not pitted or dented - that's a sign of poor quality or abuse.

The handle is equally important. Wood handles (hickory is traditional) feel better and absorb shock naturally, though they can eventually split. Fiberglass is more durable and forgiving if you're rough with tools. Avoid cheap plastic handles. The grip should feel balanced in your hand and not too slippery. Check that the head is tight - grab it and try to twist or wiggle it. Any movement means it'll loosen up fast in actual use.

Price is a decent indicator here. A quality hammer from a known maker runs $25-50, and it's worth it. Cheap ones under $10 will frustrate you because the head will come loose or the face will damage easily. If you're buying used, just inspect the head closely for cracks and make sure everything's tight. A good hammer lasts decades if you don't abuse it, so it's a solid investment.