From the Reddit "Goodbye old friend" thread:

Walt saved Jesse. Jesse lives. Walt dies protecting everyone he cares about. Full circle.

Jesse was always a prisoner to Walt in someway, whether it be by Jesse's own father approval seek or by Walt manipulating him, so it was nice to see Walt finally give him his freedom, either by shooting him or just by escaping it all.

The DEA agents who knew of Jesse's activity are dead. He has been MIA for a long time and I highly doubt he will ever get into the meth business again. He is clean and free.

They don't reveal whether Walt saving Jesse was spontaneous or planned. Maybe he was going to kill everyone, but once he realized Jesse is being used as a slave, he realizes Jesse isn't a bad person and spares him right then and there. I can't help but think this is the case, considering Walt wanted him dead out in the desert. He hated Jesse to the point of seeing him shot in the head right in front of him, though granted he was probably blaming him for Hank's death in his head.

Walt did a lot of thinking out in New Hampshire. Came back and saved Jesse, and confessed to Skyler that the cooking was for himself.

Also full circle, the show started on Walt's 50th birthday. He died on his 52nd birthday. Also he's wearing pretty much the same outfit as the first episode. Almost the same hair, too.

Walt was diagnosed with cancer on his 50th birthday. That's when he became "awake".

The series ends with Walt finally going to sleep.

Walt wanted to die in a place where he figured he would end up getting ALL the credit (posthumously) for the meth recipe.

"Remember my name."

He was just genuinely happy to be there, thinking of the memories of the cook. He died where he wanted to die.

Heisenberg was born in a meth lab, and he died in one, too.

On Talking Bad afterward Vince Gilligan mentioned hoping the show's legacy would outlive him. At other times he's said that there is a LOT of Walter White in him. Walt wanted to die around the chemistry he loved, but also wanted to get credit and take heat off Jesse.

Discussion of that quote:

http://reddit.com/r/breakingbad/comments/1ney69/this_was_possibly_one_of_the_most_outstanding/

Five minutes... May I see her?

Kind of reminds me of the final shot of LOST.

Full circle:

What to do after the finale is over:

Discussion:

http://reddit.com/r/breakingbad/comments/1newc5/what_to_do_after_the_finale/

One thing's for sure. Sweeteners are bad for you.

Badger: You know, I don't exactly know how to feel about all this. 

Skinny Pete: For real, yo. Whole thing felt kind of shady,you know, like morality-wise? 

Badger: Totally. 

(Walt holds up the money) 

Walt: How do you feel now? 

(They take the money) 

Skinny Pete: Better. 

Badger: Yeah, definitely improving.

Reddit:

http://reddit.com/r/breakingbad/comments/1nex36/badger_and_skinny_pete_summarize_the_moral_of_the/

Great foreshadowing in season 5 episode 14:

Walt's time is up.

It's the watch Jesse gave Walt for his birthday the previous year.

Vince said on Talking Bad that Walt had the watch on during the diner scene but not when he returns to visit his home.

Jesse gave Walt a watch. Walt leaves the watch and frees Jesse, giving him time.

“Anything really worthwhile is perishable.”

— Bryan Cranston on Breaking Bad's end

It was great to see Jesse smile again.

Discussion:

http://reddit.com/r/breakingbad/comments/1newzb/spoiler_series_finale_i_was_so_glad_to_see_a_smile/

We are SO far away from season 1:

Dat smile.

Dat freedom.

Dat Jesse.

Dreaming of a better place.

“The romantic in me wants to believe that he gets away with it and moves to Alaska and has a peaceful life communing with nature.”

— Vince Gilligan on Jesse’s future

Jesse finally gets revenge on Todd.

3x13 vs 5x16 ...

I did it for me. I liked it. I was good at it. And…I was…really…I was alive.

So many memes, so little time.

Ah, the memories.

The feels!

The endings of each of the six season story arcs...

[Ba]by [Bl]ue - [Ba]dfinger

 Guess I got what I deserved
Kept you waiting there too long, my love
All that time without a word
Didn’t know you’d think that I’d forget or I’d regret
The special love I had for you, my baby blue
All the days became so long
Did you really think, I’d do you wrong?
Dixie, when I let you go
Thought you’d realize that I would know
I would show the special love I have for you, my baby blue
What can I do, what can I say
Except I want you by my side
How can I show you, show me the way
Don’t you know the times I’ve tried?
[guitar solo (Joey Molland)]
Guess that’s all I have to say
Except the feeling just grows stronger every day
Just one thing before I go
Take good care, baby, let me know, let it grow
The special love you have for me, my Dixie, dear.

Wait, what about Huell???

And what about two of the best hitmen west of the Mississippi?

We'll always have the memories.

Thank you Vince Gilligan!

Andy Greenwald's homage:

In the end, he really did outsmart everyone. Not to parse Pinkman's proverbs, but wasn't this a touch too much "Yeah, bitch!" at the expense of the science? 

All the swaggering outlaw clichés turned into Swiss cheese by agonizing, bullet-ridden episodes like "Ozymandias" were made whole again last night. The story of a man became, in its final hour, the story of a legend. It seems Walt's hollow boast at the end of Season 4was premature, not pathetic. In the end, he really did win.

And Boing Boing's review of the finale, too:

http://pandawhale.com/post/28655/breaking-bad-season-5-episode-16-felina-review-boing-boing