There are quite a few different ways that you can play
We Ski & Snowboard, which means you can play for a long time alone or with friends and never get bored. The first thing you'll probably want to investigate is the School. Even though you can pretty much figure out the basics without it, I recommend you learn the advanced stuff too. In the School, you'll learn 14 different "basic" lessons that teach you how to control yourself on the skis. The great part is that if you choose to snowboard, you get even more completely different lessons. The School can only be played by one player at a time though, so you'll need to go there alone.
The rest of the modes can be played with up to four players on either skis or snowboards. Given the difference in the controls, it's like you have two different games in one. The Resort and the Mountain are where you'll probably spend most of your time. At the resort, you can choose individual courses to try. You can talk to people you see to find out things that are going on. You can participate in a variety of challenges, too. On the Mountain, you can ride all the slopes going from one to the next. It's quite fun to go to the very top of the 3,000 meter mountain and just jump off. If you're talented enough, you can even make your character do somersaults in mid-air. But if you get sick of flying helpless down the mountain, you will eventually land in the snow where you can continue on down the correct way.
As you're going through the game, you'll find a photographer in quite a few places. You can get your pictures taken as many times as you want. To view all these, go to the Album. You will be able to see all the players photos, not just your own here. In the Records, you'll find all the things that you picked up in your travels and all the records that you may have set.