Which Directors Cuts are huge improvements, and which are massively detrimental?

I always figured Directors Cut = Better And Longer, but have since learned, sometimes they are shorter (Bad Santa) and sometimes much much worse (Apocolypse Now, technically the redux) and sometimes there are like 15 different cuts (Blade Runner, hyperbole, I didnt count)

So what are the best Director Cuts and the Worst Directors Cuts out there?

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