You are most like
The Dwarves
As the halls of Moria show, Dwarves like building and inventing.
Curiosity is one of your strong points as it allows you to think of better ways to acheive goals. You may try to outwit the system of you get bored or annoyed with it. Social interaction energizes you. The more people the merrier. You have a tendency to introspection. In your desire for clarity in life, you may have the tendency of being remote or even "heartless". You like keeping your options open. Closure is probably not one of your strong suits.
As the foil to Aragorn, Sauron clearly embodies the evil side of this personality.
Traits: Pragmatic, autonomous, ingenious, resolute. On the dark side you could desire power and domination
I am a little bit surprised, but not displeased, I always had a fondness for the dwarves...
Sam is heroic, I'd agree to that. He is the most 'Hobbity' character, and I love the Hobbits.