I never want us to be like Syracuse, ugh. Zone defenses by their nature tend to be finesse and seem to coax players into a softer passive style. As noted by dooleybull06 you lose the rebounding edge - bc you're playing an area and less able to box your man out. Good man defenses are aggressive and I think tend to juice a players competitive instincts. It can turn everything up a notch. A really good man D sometimes gets described as relentless, you'll never hear that said about a zone.