Challenging terrain, laid back, no crowds, great skiing
Not many if you're interested in serious skiing
This year, La Nina aside, is one of the best openings I've seen at Taos in the over 20 years I've been skiing there. The mountain has great coverage and the snow is great. One of the reasons that the snow is good is the fact that most steeps are boot packed to lay in a good base.
Taos is not really a resort for beginners, even though the Ski School has a really good beginner program. For families, they have a great kids program as well. For intermediates, there's a lot of terrain, but it's really the steeps that shine. There's both lift-served and hike-to challenging terrain and the ski patrol is excellent at opening terrain when it's safe to ski (Taos can have some serious avalanches: one nearly took out the top of lift 7 one year). Pipeline, What Chute, Longhorn, Werner's, Lorelei Trees are lift-served faves of mine. Hike-to faves include Stauffenberg, Wonder Bowl, Tresckow and Two Bucks.
The downsides: there's not much nightlife, even in the town of Taos. The resort's dead most evenings. If you're looking for grooming everywhere, don't go to Taos. You'll be disappointed; Taos believes in natural (bumped, pow, etc) terrain.
I don't work for Taos. I just ski there lots.