Let me just say that I think this week's TuesdayThinger question is great and ties in to my vacation reading, as one of the books I read was part of a series. I think I have only visited the LibraryThing Statistics page a couple times and never have I looked at the Series feature but its I think its very cool. I guess I love to read series because I own books from 110 of them. I'm totally blown away... although now that I think about it I also love to collect books by my favourite authors so it makes some sense.
What I did realize was that I actually own a lot of books that I have not added to my library yet so its hard for me to tell whether I have many completed series but I do like to own the complete the series by favourite authors. I was also shocked by certain series where I realized there were much books in the series than I had thought (i.e. J.D. Robb In Death series). If I actually added to my library all the books I own I think my largest number of series would be the Bridgertons by Julia Quinn at 14.