If you take even one away, this country would be a far worse place. And in that spirit, they are all my favorite, with a lean toward the 2nd as topping the list of the most fun Amendments.
2nd for the fun factor, next would be the first because it is my right to say so. Of course if you disagree you may notify the press and peaceably assemble in protest of my opinion.
If government paid attention to the ninth amendment we wouldn't need any others.
But, If the US people understood the constitution, there is no need for the bill of rights in the first place. Which is what the ninth amendment attempts to emphasize.