I'll try to touch on points in order as best I can...

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E1-3 who's gets darker then ultimately black? vader(annakin) as sith

...  So there's a hole in your theory as far as Anakin's "change".  The Vader suit as an end result doesn't change that he was Sith before that, and wearing his Jedi Robes he wore for most of one film and most of the previous one...  Not much real change there then with Anakin actually...  At least nothing that correlates with his ACTUAL physical transformation over time that we can witness.

Well argued, fact- based, agreeable point

[Is it really "over"confidence?  If it was, he'd have been beaten I think...  Palpatine referenced over-confidence being a weakness, but that was based on Palpatine's thought that the Alliance would succumb to his trap. 

Not sure about this one- you say" you think" it's really a speculation point-now that I look at it more I believe Luke was more naeive(-did I spell that right?) than overconfident, still while not totally abandoning the overconfidence- I truly believe now that it didn't matter -the reason he wasn't beaten by his overconfidence/faith in his friends is because Vader was to ultimately decide the galxy's fate not Luke, this whole saga is about Vader not Luke. why didn't he name it starwars: the story of darth vader anyway? Vader still makes all the important decisions of importance on his own regardless of influence

Luke went into the Jabba situation, and handled himself perfectly fine...  He freed his friend(s), he gave his enemy ample opportunity to walk away from the situation...  He saved the day.

He didn't even threaten Jabba

Really? he didn't while he was on the platform? what, just because you're under duress you can't possibly threaten someone(line of thinking)? sorry/ this is a " how you thought about it situation" the facts are obvious " this is your last chance/warning,etc." it's how you interpret it I guess and....we disagree



 and he was downright afraid of his situation with Palpatine/Vader.

Fear ..yes, a darkside path-I'm glad you mentioned this sithlike trait
 
he was willing to sacrifice himself on the Death Star, so long as he, his father, and Palpatine were destroyed together. 

Was the moment he ultimately choose his fate of light or dark...while...Vader decides for the galaxy's fate  

-Was Mace Windu "sith-like" confronting Dooku?
-Was Mace WIndu "sith-like" refusing Dooku's offer of mercy?
-Was Yoda "sith-like" when he marched into Palpatine's office, and exchanged what I hardly consider a humble back-and-forth with Palpatine?

I feel Mace may have been starting to head down a dark path by attempting to kill a defenseless person-but we'll never know will we?

The thing you must realize is that Mace and Yoda are so powerful because in battle they're able to "dance" with their own personal dark power-but, they can control it-the comic books and novels really explain the dark power of Maces' vaapad fighting style and yoda/quinlan Vos among others who "can control their demons"
 
-Was Qui-Gon "sith-like" when he told the Naboo to leave and let he and Obi-Wan handle Maul?

yes, it was very arrogant-like Annakin in the bar"jedi business..."

The point with all those instances is that each of them showed EXTREME confidence.  Some to the point of legitimate "over-confidence".  I would hardly label Yoda, or Mace as ever being "sith-like" though.  There's a fine line between confidence and arrogance...

Like I said above this is left up for interpretation- there's little hard line facts ultimately proving one another side on this. Being sith-like for a moment makes one not a jedi for their whole life???-obviously no





But, a key to think of is "bad" and "badass" aren't the same thing...  Being "sith-like" is bad...  Being a badass though, just implies you can handle your business and you know it.  What the lines are that divide the two are what's blurred.

Agreed





I think that looking at the colors as a sign of maturity can be taken several ways...  it can be looked at as not applicable at all for sure, but Luke's black outfit is plain, it's simple...  It's setting Luke apart from the organization (Alliance) while not being bright, vibrant, or "loud"...  So it's setting Luke apart but not "seeking attention". 

I see it differently- I see it setting him apart because it IS different
Not too many rebels wearing ALL black mind you-see black sheep


You ARE incorrect on Vader's turn towards good- it actually begins in ESB- Vader showed...? restraint? "the Emperor is not as forgiving as I am"..what? since when is he forgiving ? the vader I knew would just assume choked the bitch and get a new commander to over see the building completion. Also if he was all evil he would have killed his own son-never would have suggested to turn him to the emperor's side-if he was evil he knew he would be signing his own death warrant if he did this.(but, we all know it makes for a better story that he didn't kill the whiner)

My conclusions on the subject are then that Luke's costume doesn't correlate with his personality if we're discussing Luke being "bad" or "sithlike".  There's nothing substantial there to back that in my point of view... 

Is Luke "badass" though?  He's confident and sure of himself in every situation except his final trial against Palpatine and Vader.  To me that makes him a badass for sure!   But not a "sithlike" character or "bad", etc.