My Favorite anime opening is the one from Mob Psycho 100!
This is because it's just so random, but the more episodes you watch, the more it starts makes scence and the more you start to see. It's just so weired and fun, it fits the rest of the show so perfectly!

     I would recommend Mob Psycho 100 to anyone who asks me what they should wach, it's only 12-ish episodes, and is just all around fun! It's by the same people who did One Punch Man and, in my opinion, is much better.