Will you choose the light or the dark?
I personally chose Sith because they have more freedom and they have more abilities. The Jedi are held back by their morals so they cannot reach their full potential. Yes, the Sith do have drawbacks such as not being able to heal themselves like the Jedi can, but overall, in any circumstance, when a Sith Lord will go against a Jedi Master, I believe the Sith will win. I also get angry easily so I can just -blam!-ing kill everyone with that :)
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Sith, being good is for the weak. Also i can kill my enemies with lightning or choking them from a distance.