I've been to Whistler, Schweitzer, Stevens, Snoqualmie, Big Mountain (MT), Silverstar, Nelson and probably a couple others I've forgotten. I learned to snowboard at Baker. I love the lack of resort facilities at Baker. No condos, shopping malls and not a lot of touristy places during the drive up. The snow can be deep and there is something for everyone from "green" beginner routes, double black and out of bounds adventures.
The hometown vibe, low cost food and variety of runs contribute to this being my favorite place to board. I'm not sure if they are still offering this - back in the day all 5th graders were given a free season pass. My son received the pass and I enrolled him in a class with his buddy. While he took his class I went out and explored. After his class we would spend the rest of the day together. This really helped us afford the high cost of lift tickets.
Baker ski area holds the world's greatest recorded snowfall in one season: 1,140 inches (95+ ft) during the 98-99 season.
It is reported that Baker also has the highest average annual snowfall of any resort in the world - 641 inches (53.4 ft). When returning from your ski/boarding day at Baker consider checking out the 88' Nooksack Falls - it's just off the highway.
Finally, if you are interested in checking out bald eagles - do a little research to learn when they feed on the Nooksack River. I've literally seen more than a dozen of these beautiful birds feeding.