Good consciousness raising article. I've done some x-country day tripping in the Washington Cascades and enjoyed the seasonal contrast. Camping is a whole other order, but just some extra weight and bulk as far as base weight goes.
I think winter navigation is a daunting aspect for less experienced hikers, with the trail covered and landmarks blurred. It's not a good time to get lost. Honing up map and compass skills on dry ground makes excellent winter travel preparation.
Knowing your limits is important on winter trips. Turning around and going home is NOT failure, just good common sense. I haven't done multi-day backcountry snow trips. I would be prepared for much more physical exertion and knowing what the weather report means for your location. I would want to know more about reading avalanche conditions, as many of my favorite summer trails have slide chutes that aren't an issue after the thaw.
It can be beautiful. The mud and leaves are covered over, bare trees have snow covered branches, the air seems so pure, and everything sounds different in the snow. If you can escape the snowmobilers on the weekends, the solitude is wonderful.