Best and worst regeneration scene

I'm currently re-watching Series 10 and I got to the point where Twelve is ready to regenerate so it made me think back to Eleven's whoosh of a regeneration, which took me aback when I first saw it.

What are the best and worst regeneration scenes for you? You can also rank them from best to worst, if you feel so inclined!

Edit: I don't think I've seen anyone mention Eight > War in their top 3 yet, but I personally love it and would rank it as one of my top favorites. As for the worst, if we count it as a "regeneration", the cake goes to the bigeneration for me. If the bigeneration only has one anti, I'm that anti, etc. Otherwise, it's probably Six > Seven, even just based on the silly wig only.