mine is military sci-fi in general and the conrad stargard series by Leo frankowski
Even in my lib days I could only do science or culture victories. The micro-mamagement of 3 gazillion different units once you are deep in a domination playthrough bored me to tears.
Science and culture victorious are pretty fun imo, Domination never really interested me but I always had a guilty pleasure of taking over natural wonders from other civs in my science games. Religious victory games are unfun