I've only watched 8-17 but the only ones I'd say were definitively better were 8 and 14. I think 15 is underrated because the gameplay at the end was very rare. To me, 17 was a GREAT season and it was made better because we saw a great gameplayer finally pay for the outlandish mistakes that she made. Plus Steve's final 2 jury management was some of the best ive ever seen. This definitely goes down as one of my favorite seasons in my book.