Most games don't need blood and gore at all because most games don't revolve around violence... and then even then when there is some form of violence, blood and gore is still not necessary. As fun as it is to be able to see blood and gore in games such as Soul Calibur, it really doesn't need it... at all.
The need for blood and gore revolves around art style more than it does enjoyment for me. If it's necessary to have it, then it should be there. For example, I HATE how No More Heroes (Japanese, Europe and Australia version) doesn't have any blood and gore in it despite it being the original concept of Suda 51. It was part of the artstyle and was a tribute to many a gory movie that have been released over the years. Having that element taken out lessened the game.
As for whether I enjoy th blood and gore... yes and no. As I stated before, it all depends on art style and the concept of the game in the first place. Overall it's the overall game itself that I value, not the blood and gore. When buying a game, blood and gore is a non-issue and I don't even think about it. It would be as silly as purchasing one game over another because one has a chick with big tits while the other doesn't...