Breckenridge works for a lot of people. The town is real, the terrain is broad, the high-alpine story is strong, and the name recognition makes planning easier. It's also one of the easiest Colorado resorts to choose without thinking hard enough about crowds, altitude, and what kind of skiing your group actually wants.
The strength is range. Beginners, intermediates, advanced skiers, park riders, and people who care about the town can all make a case. Few resorts solve that many group problems at once, which is why Breck stays so popular.
The downside is that popularity follows you everywhere. Lift lines, busy base areas, and altitude fatigue can all shape the trip. Breckenridge is best when the group wants Colorado energy and can handle the scale of the scene.