I DH skied for about 7 years, switched to snowboarding and have been doing that for 15 years. I picked up tele skiing about 4 years ago and now switch back and forth between tele and the board.
The first switch came from boredom. I think it is pretty easy to pick snowboarding up, there is a fast learning curve, but just like anything - it takes a loong time to really rip.
I picked up tele to try something new in the backcountry - I love it for the challenge and the feel of the body mechanics, but I feel like it is going to be a long time until I am an expert.
As far as comparisons - yes, you definitely can get the same feelings from boarding as from skiing. In my opinion (take it for what its worth) I like the flow of boarding more - feels a lot more natural and is far superior to skiing in the deep powder. You get more float, esp. in broken powder.
The disadvantages to boarding are mobility in the backcountry, and difficulty in the flats.
My advice to anyone learning to board is to stay OFF the bunny hill - you will only learn when you have an actual mid-angle slope. That and do NOT lean back. Your weight should always be forward or centered. Most common learning mistake.
IMHO, of course.