Good Question: To me it seems like when I watch videos it is a toss up for which is more common/natural between people doing leading and trailing tail grabs. I struggled with this for a while and kept trying both, in a leading (Spin L - L to L) the tail is right there near the hand that leads the spin so it's easier/quicker to grab, but I've found that in bigger jumps with more time it tweaks better for me to grab my trailing tail and then "pull it around" with me as my trailing hand completes the spin. Keep trying them both watch it on video and decide yourself.
right on right...
if i grab right hand right ski on a leftside spin and pull it sets me cork and i love it.
but if i spin rightside i would grab left hand left ski for anything over a 3
jeah totally agree, plus the leading tail is easier to tweak for me and makes it look a lot steezier.