For me it goes:
1
2/6
5
3
4
1 is simply a cleverly done classic. It fired on all cylinders, as everything came together. 2 is a great sequel, but not as good as 1. And 6 is a great sequel that enhanced its predecessor. It also has the most creativity with the kills, and revs up the tenseness. 5 just has the best chemistry of all of the groups. 3 is the most fun, but also wacky. I also don't like how they cut out the second killer reveal.
4 just had the worst new characters.
1
2/6
5
3
4
1 is simply a cleverly done classic. It fired on all cylinders, as everything came together. 2 is a great sequel, but not as good as 1. And 6 is a great sequel that enhanced its predecessor. It also has the most creativity with the kills, and revs up the tenseness. 5 just has the best chemistry of all of the groups. 3 is the most fun, but also wacky. I also don't like how they cut out the second killer reveal.
4 just had the worst new characters.