I'll play. Copper Mountain. I can't call it a perfect match, but it's the best for us.
Sentimentally, it's the first place I ever skied, the first year it was open. A few years ago we bought a condo at the base of that first bunny hill. I'm not a terribly sentimental person or anything, but it's kind of cool ending every day skiing the same run I started on 30-something years ago.
Growing up, we skied a lot of CO resorts, but it was mostly Copper, Vail, Loveland, Mary Jane, ABasin. When we moved back to Colorado 10 years ago, my brother patrolled at Copper. At the time, my kids were preschoolers, and I think Copper is a fabulous learning place. Much is made about the way the mountain is segregated by difficulty, and it's really true, and super nice especially for beginners and experts. I do like the fact that the Epic Pass has made it actually less crowded, I think, since most everyone tends to buy the VR passes. (But I need to temper my dislike of crowds with understanding that they need to turn a profit... we shall see....)
As for the skiing, there is a lot of variety. It certainly isn't my absolute most favorite place to ski in the world, probably not even in Colorado, but it's a good balance with a little bit of everything. And it's quite easy to avoid lift lines if you are an advanced skier or better. It's big enough to be interesting, but not overwhelming.
When we were real estate shopping, its location made a lot of sense. Right there on I-70, you can easily get to other places from Vail to Summit. Steamboat can be a day trip, too. It wasn't as expensive as Vail or as crowded as Breck or Silverthorne, and there was nothing for sale at the time in Frisco. There wasn't really that much of a premium for slopeside lodging, which is so convenient. The village is kind of boring, but there are some good restaurants, and boring = quiet. Summer is really
quiet and, again, it's easy to travel any direction to hike or camp or whatever. (I keep praising "quiet"; must be getting old.
) That said, they do have concerts and fireworks and other things going on year round so it isn't dead or anything.
Certainly things aren't perfect ... my favorite lift is Sierra, but it's way way way too short. Other good terrain is just hard to get to and impossible to lap (Spaulding, Union Meadows, Tucker, various glades). And if you are skiing in a group with different abilities, it's very difficult to stay together, which is the downside of the segregated terrain.
I am curious too if my kids will get bored soon. We travel a bit, but the older they get, the harder it is to get them away from school and sports. I think they thought they'd died and gone to heaven when we went to Snowbird last month. Oh well ... maybe they'll move to Utah (or Jackson Hole) when they grow up and let us stay at their houses for vacation. :-)