Memento

This movie was interesting in plot, but it was definately confusing for the audience, such as myself.
I think this was the director's intention though, to portray how leonard feels and also to portray his life being stuck in his condition that he has. Since he can never actually remember anything, the things that happened in his life could be easily distorted, his memories could be inaccurate, none of these thigns could have actually happened, and i guess how and why things happened could be open to interpretation.

I like the beginning part where we see leonard waving around a photo until it is completely blank, and also when he reaches out his hand and his gun flies into it.
At that time, i thought maybe Leonard had some alien superpowers or something. But i now realize that it is a backwards replay of Leonard taking a picture and dropping a gun.

I have some questions though, just to clear up some confusion w/ the plot, since i gave up trying to understand the order of events with the frequent flashbacks and the backwards motion of the film.

So who is Dodd? And why was he chasing Leonard at one point in the film?
Did natalie go through all of that just to mess with leonard and take revenge?
Who was the man that leonard killed and how did he think that the man he killed was the one who killed his wife?

It sucks for Leonard because every time he wakes up, he has to figure out yet again where he's at, why he's there, how he got there, and what were his initial plans.
Why can't he just drop the whole case all together, not go through all that effort to figure things out, and just live comfortably? He can't remember anything, and the results? he ended up killing the wrong guy anyway. And even that, he will not remember. Does this mean that he will continue throughout his entire life looking to kill this man?