Which is your favorite Science Fiction series?

Which series of Science Fiction books do like the best?

We are looking at a series of at least two or three books. There are many series out there and I could only list a few. If you have others, not listed please put them in comments.

I will publish the results after the poll closes. THE DUNE CHRONICLES BY FRANK HERBERT. 42.9% THE VORKOSIGAN SAGA BY BUJOLD. 0.0% THE FOUNDATION & ROBOT SERIES BY ASIMOV. 19.0% ZONES OF THOUGHT SERIES BY VERNOR VINGE. 9.5% ALTERED CARBON BY MORGAN. 4.8% THE HEECHEE SAGA BY FREDERIK POHL. 0.0% SPRAWL TRILOGY BY WILLIAM GIBSON. 9.5% RINGWORLD SERIES BY LARRY NIVEN. 0.0% THE UPLIFT SAGA BY DAVID BRIN. 0.0% THE THREE-BODY PROBLEM SERIES CIXIN LIU. 14.3% 21 votes \ poll ended