At first, I really enjoyed it more than Game of Thrones but that feeling hasn't aged as well as it could have. After the death of Ragnar, the show has started to drop off for me personally. Other than Lagertha, Bjorn, Ivar, and Rollo I find a lot of the characters to be really awful. Game of Thrones on the other hand has been able to keep my interest a little bit better.
Vikings is still one of the best shows out right now and I hope the next season is really good. I'm hoping for an Ivar redemption arc and I hope we get more from Floki. (Not 100% if he died)