a true twin (twin shape + twin flex) is ideal for a freestyle rider
Yes indeed A setback directional twin gives you more all mountain versatility. Remember now, setback can be anywhere from mininal at .5 too setback a mile at .25 maybe more for a swallowtail or dedicated pow stick.
Depends if your version of all mountain includes alot of freestyle, or a lot of powder. For more freestyle you would want true twin, for an all mountain with an emphasis on freeriding you might want directional.
It's preference. I ride mountain on a twin tip. Directional boards would be lame in a park, though.
Lame in the park ?? come on Flick ? thats bollocks. IMO. I ride a setback twin (.5) and it rips the park and pipe and I have nver set the binders back for pow. That being said, I ride a quiver of boards so I choose depending upon conditions. If I had the money for one board and one board only, my choice would definatley be a slightly setback twin... and yes IMO its more versatile all mountain w/o hindering your freestyle progression... AND more stable landing jumps AND more Pop out of your turns due to the stiffer tail..