@Chris B I love how much you support that season! I feel the same way about certain other RH seasons out there (and @Antoyne I agree that every episode of OC this year was highly watchable and a fun ride -- the best of the last 4-5 seasons for me).
With regards Peggy/Lydia season, I have always been a Lydia fan and felt she should not have gone the first time after S8. However, I found it hard to connect with S12. I watched The Quiet Woman (EPIC episode), Iceland, and the overall-decent reunion episodes. Peggy's cancer story (which she clearly was still raw and processing) hit a bit too close to home at the time and one reason I pulled back from the show.
Another was Megan King Edmonds. Despite a good previous season, I found her to be a humorless snot this time around.
I also did not like the obvious way Tamra, Shannon and others were trying to ice Vicki out by not filming with her. I get why, but Shannon's dramatics lol