good runs and weather; few people and short lines.
slow lifts, smaller mountain
i learned how to snowboard on sunlight over 15 years ago. I loved learning there! the main run, midway, is perfect for first timers. However, it also holds some very good expert terrain as well. defiance and desperation will get your heart pumping, especially on a powder day! and for the cross country skiers there's ute trail. it never has very many people there too, due to the fact that it sits directly between what i think are some of the best mountains in north america: vail and aspen. so if you're just learning or just want to avoid lift lines and don't mind slow lifts, sunlight is the place for you.
P.S. about half the price of most mountains in colorado!