I vote for Sword Art even if there are some people who say it is trash
but in my opinionKirito becoming sort of a side character in War of Underworld S1 kind of changed my view on the anime entirely, but then I realized how fricking epic it would be once he returns back with his fluctlight in War of Underworld s2
Edit: I vote for Sao as my favorite, but that doesn't mean that I claim that it is better than the other anime, I respect every anime regardless of the genre, and that's what we should all focus on: respect.
Edit 2: sorry if Edit 1 was corny or something
