I actually like both, but most times I prefer watching the anime. It's so fun watching does awesome fight scenes in the manga come to life. But when it comes to dining out the real details without any cuts, I go for the manga.
If I have to choose, I prefer anime since I don't like to read novels or manga so much, I like it more that it is in a series format, it makes it more entertaining for me and lighter, but I have also read mangas and I like them.