I like a boat that offers good performance (fast, which likely includes a spinnaker), is double-handed and requires a high degree of teamwork. I don't like a boat that is designed to the edges of the envelope for marginal performance gain, or is designed for too narrow a performance band (e.g., don't try and sail it in under five or over fifteen knots), or even designed with only buoy racing (i.e., windward/leeward) in mind.