I always find this sort of listing interesting because I tend to not fit most other people's interest. A few matched my taste, e.g. Chanur series by Cherryh, Time trader series by Norton, & Honor series by Weber, and several authors I like but more often than not the series mention are ones that I did not like.
Not yet mentioned (or at least I didn't notice them) are;
- the Crystal Singer series by Anne McCaffrey,
- the Psion series (Psion, Catspaw, & Dreamfall) by Joan D. Vinge,
- the Third World series by Ed Howdershelt,
- the Grendel series (The Legacy of Heorot & Beowulf's Children) by Niven, Pournelle, & Barnes,
- (some would say not SF but it has the flavor of SF to me) the prehistory series (beginning with Clan of the Cave Bear) by Jean Auel.