In most MMO's I generally have no issues. But sometimes there are those that give me horrible motion sickness due to one kind of animation or another. For example in Blade and Soul. I can't play that game because of the sprint animation. The way the game does that zoom in and out when you sprint and stop. After half an hour or so of playing I end up with such extreme nausea it makes the game impossible for me to play.
I was worried about Revelation because of the leaning animation. The constant swaying of the character on the screen was starting to get to me the more I played the Chinese version. So I did some googling and found this video! My future with Revelation has been saved! For now!