I have a hardtail (its a 4 X steel framed tank). Big forks at the front, and a bit of effort, I haven't seen much that full suspensions would make me do that I won't on the hardtail.

http://www.bikemag.com/news/guy-wins-megavalanche-division-o...

(Admittedly, full suspension is probably a bit more forgiving than a hardtail, but I have more fun on a hardtail).