Best and worst Supreme Court justices of past decade.

Who do you consider the 5 best Supreme Court justices of the past century.

Who are the 5 worst?

Of the Presidents like Nixon and Reagan who appointed multiple justices, who do you consider the best justices each of them appointed? Who were the worst? For instance, I'd say that the best Reagan appointed was Kennedy. The worst (by far) was Scalia.

Which President of the past century appointed the most Supreme Court justices? FDR? *edited to change decade to century, although I can't in the title. I just woke up from a nap and apparently have no idea what I'm typing (even moreso than usual). Sorry for the confusion.