Each to his/her own. Many of us like his books; but, truth to tell, I haven't read then in a very long time.
I've only read the one. I managed to finish it, but honestly there was no hope for me to enjoy it given the way it treated my hero out of time, Octavian. If I had read another of his works before that I may have been a fan. As it is, circumstances are such that I feel a splanchnic reaction to the mere mention of Graves.