I own a lot of Lego sets, but in number I would estimate my Pirates to be about 60%. I try to buy all the sets that come out. I double up on a lot of sets like the Imperial Flagship, Soldier's Fort, Whitecap Bay, London Escape, etc. I also have many Impulse sets like Soldier's Arsenal and Cannon Attack. The sets I have from other themes are usually the bigger ones. For example I have the old Millenium Falcon, Scorpian Palace, City of Atlantis, MMV, and the large City Airport. They are big, but only count as one set, though.