I have complete sets of all the series. I only get multiples of ones with useful parts. For example, the Pilot or the Musketeer. I also make armies out of some figures, Like the Spartan, Elf, Viking, Gladiator, etc. But I did go overboard with Series 2. I ended up with 5 Pharaohs and 5 Witches. Since there was almost nothing out when Series 2 came out, I ended up in the end with 62 minifigs.