How do you wish this had ended?

I always interpreted the title "breaking bad" as "becoming bad".

So for me, the last episode should have been Walt as an absolute low-life. He definitely did decline into a cold blooded killer, but a cool aspect would have been him turning into something like the Godfather.

I would have written the series with him as Heisenberg, his alter-ego, at war with the DEA. The last episode should have been him killing Hank and Jesse, then giving the empire to his son.

He could justify it like "I created a product so good that it benefits society by ensuring a predictable outcome at a steady price. The DEA were in the way. Hank was in the way. You cannot stand in the way of *cough cough*, progress. I leave this to you, Walt Jnr. It's yours. Nobody will ever make fun of you now. Nobody will ever think of you as weak, or a cripple. You show your strength by showing the pain you can inflict on people. Remember that."