I remember Space 1999 when I was a kid. For kids like me starving for sci fi, it was unresistable. I felt the same way about Earth 2 when it came out—not bad when there wasn’t a whole lot of other sci fi TV to be had—aside from Trek.
And Dark Star? Oh my gods, what a great dark comedy depicting the truth of space travel—travelling through space is long and boring and will drive you insane.