Never understood the Grateful Dead's mass appeal. I never thought they were that good. Its OK if you tell me I'm wrong. Everyone has an opinion.
Did you ever see them live? I heard their recorded music for many years and, like you, I wasn't particularly interested, but then I went to a show. After that, I never missed a nearby show, and I flew hundreds of miles to see them several times. Their element was the stage and their studio work didn't even remotely approach capturing what they were about.
There was nothing like a Grateful Dead show, before or since.