I enjoy Kihei for the quiet corner it can be. There are restaurants and shops nearby and no shortage of things to do. As a scuba diver, I like Ulua Beach for the easy access of shorediving and snorkeling, but there are other sites nearby. I'd recommend the Maui Dive Shop, among others, to arrange boat dives at the Molokini Crater and St. Anthony's Wreck (which is a sunken vessel but technically not a "wreck"). My wife and I vacation for peace and quiet, not nightlife, and Kihei fits neatly into that plan.