These are the sets I don't have, and need to complete my collection:

10023 BIONICLE Master Builder Set (2002)

10201 Takutanuva (2003)

10203 Voporak (2005)

10204 Vezon & Kardas (2006)

20005 Klakk (2008)

20012 Click (2009)

6126 Good Guy (2008)

6127 Bad Guy (2008)

6620 Ultimate Accessory Set (2006)

6638 Ultimate Creatures Accessory Set (2006)

6934 Good Guy (2006)

6935 Bad Guy (2006)

6944 Good Guy 07 (2007)

6945 Bad Guy 07 (2007)

7116 Tahu (2010)

7117 Gresh (2010)

7135 Takanuva (2010)

7136 Skrall (2010)

7137 Piraka (2010)

7138 Rahkshi (2010)

7216 Gold Good Guy (2006)

7217 Duracell Bad Guy (2006)

7716 QUICK Good Guy White (2006)

7717 QUICK Bad Guy Green (2006)

7718 QUICK Bad Guy Yellow (2006)

7719 QUICK Good Guy Red (2006)

8026 Kraatu (2004)

8538 Muaka & Kane-Ra (2001)

8539 Manas (2001)

8556 Boxor (2002)

8557 Exo-Toa (2002)

8558 Cahdok & Gahdok (2002)

8581 Kopeke (2003)

8584 Hewkii (2003)

8596 Takanuva (2003)

8624 Race for the Mask of the Life (2006)

8625 Umbra (2006)

8626 Irnakk (2006)

8711 Master Accessory Kit (2004)

8713 Lego Bionicle Building Collection (2004)

8715 Ultimate Creatures Accessory Set (2005)

8758 Tower of Toa (2005)

8759 Battle of Metru Nui (2005)

8763 Toa Norik (2005)

8769 Visorak's Gate (2005)

8892 Piraka Outpost (2006)

8894 Piraka Stronghold (2006)

8925 Barraki Deepsea Patrol (2007)

8927 Toa Terrain Crawler (2007)

8954 Mazeka (2008)

8996 Skopio XV-1 (2009)

8998 Toa Mata Nui (2009)

Kohrak Va

Tahnok Va

Turaga Nuju

Turaga Whenua

Turaga Onewa

Lots of sets. sets... So, of the sets that count in mine and Iro's competition... I have 32 sets to get:

10023 BIONICLE Master Builder Set (2002)

10201 Takutanuva (2003)

10203 Voporak (2005)

10204 Vezon & Kardas (2006)

20005 Klakk (2008)

20012 Click (2009)

7116 Tahu (2010)

7117 Gresh (2010)

7135 Takanuva (2010)

7136 Skrall (2010)

7137 Piraka (2010)

7138 Rahkshi (2010)

8026 Kraatu (2004)

8538 Muaka & Kane-Ra (2001)

8539 Manas (2001)

8556 Boxor (2002)

8557 Exo-Toa (2002)

8558 Cahdok & Gahdok (2002)

8581 Kopeke (2003)

8584 Hewkii (2003)

8596 Takanuva (2003)

8625 Umbra (2006)

8626 Irnakk (2006)

8763 Toa Norik (2005)

8954 Mazeka (2008)

8996 Skopio XV-1 (2009)

8998 Toa Mata Nui (2009)

Tahnok Va

Kohrak Va

Turaga Whenua

Turaga Nuju

Turaga Onewa

I think Iro has me beat.