Snowboarding is funner than skiing... you cant do shit on skiis rather than try to go really fast down a hill... WOOO... well thats not really true, but in my opinion skii's are a pain in the ass to get on, since you have two to worry about.
No, it's not restricting. It would be trouble if your feet were close. But on a snowboard they aint. The way your feet are placed it give you great stability and control. If you ever did some wakeboard it's just the same. Try it on a mountain or something put your feet like in when you do ski then do the same like on a snowboard. You will have much more stability while placing your feet the snowboard way cause the distance between your 2 feet is what give you the extra stability.