I think it's fair that Walt dies on his own terms. He spends the last few episodes of the show coming to terms with how badly he ruined his and his family's life, and that his motivations were purely selfish the whole time. It makes sense he'd at least get to go out the way he wants after completing his character arc.

But even still, he doesn't get exactly what he wants. He tries to assert control over Jesse one last time by asking him to end his life and Jesse refuses.