Xenomorph

The light side powers require a bit more tactical prowess than just "FWOOM FWOOM lifedrain, dead" but when used correctly are at least as effective.

I played my lightside as the melee-heavy, force-light class (Guardian, I think?). I made him a self-healing, force absorbing, rapid-combat machine. Basically used the force powers as a sort of deflector shield and continual medpack while going heavy on combat stats and abilities (from the base Soldier class).

And, was was previously mentioned, there's a lot more content to the light side. Dark side play is basically to screw the quest-givers out of 50 credits or whatever and take off, where the light side actually does the quests.

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The facehugger is short-lived outside the egg which normally protects it. Armed with a long grasping tail, a spray of highly-concentrated acid and the single-minded desire to impregnate a single selected prey using its extending probe, it will fearlessly pursue and attack a single selected target until it has succeeded in attachment or it or its target is dead