I haven't really watched many movies this year but here we go...
Favorite:
Civil War
2nd favorites:
Rogue One and DeadPool
Fighting for the Least Favorite spot:
X-men, Suicide Squad, BvS (the extended version actually helped to sort out many of the issues I had with the theatrical version but they shouldn't have released it that way to begin with)
Actual least Favorite spot:
TMNT 2 (One of the worst movies I have seen in years.)
You know.. now that I think about it, most of the movies I saw this year were superhero movies.. hmm.. interesting.