Well said, FilthyNwah - I totally agree. I play my Juggernaut completely DS, assuming that he chose to really embrace the DS no matter what concrete situtation is at hand - in order to achieve Sith greatness. But that's just kind of a role-play-reasoning, nothing more. For the same reason, I play my Sage completely LS.
It is interssting to follow both paths consequently, but it's also kind of boring since every choice is already written in stone. Therefore, storywise I like my Sniper the best. Because I see his role as a pragmatic ... problem-solver, he simply chooses freely from case to case. This gives him a much more faceted aspect, although my LS and DS points are both mediocre.