that might be different with shows as dark as TVD but LOST wasn't that dark.
Wrong. Lost was a whole lot more darker than TVD. Darkness of the show is not decided by blood and gore. Lost was a helluva lot more atmospheric, dark and deep than tvd will ever be. And no ammount of necks snapped or heads torn off in tvd will change that.
alot of the show was based mostly on relationships and how people were affected when people, strangers they had just met and got to know, got hurt or killed.
I do not see Lost that way. LOST as the whole was a perfect representation of chaos theory of elements in complex system interacting with each other in a motion of cause and effect. Everything was connected, everything happened for a reason and nothing was pure coincidence. It was a complex mechanism where even smallest decisions would lead to most unexpected conclusions along the way. And viewers were only shown a small portion of that mechanism. And that was good.