Series I'm glad I've seen none of

1. Big Momma - Big Momma's House (2000), Big Momma's House 2 (2006), Big Mommas: Like Father, Like Son (2011)

2. Ernest - Ernest Goes to Camp (1987), Ernest Saves Christmas (1988), Ernest Goes to Jail (1990), Ernest Scared Stupid (1991), Ernest Rides Again (1993), Ernest Goes to School (1994), Ernest Goes to Africa (1997), Ernest in the Army (1988)

3. Ghoulies - Ghoulies (1985), Ghoulies 2 (1987), Ghoulies III: Ghoulies Go to College (1991), Ghoulies IV (1994)

Series I'm surprised I've seen none of:

1. Dirty Harry - Dirty Harry (1971), Magnum Force (1973), The Enforcer (1976), Sudden Impact (1983), The Dead Pool (1988)

2. Nightmare on Elm Street - A Nightmare on Elm Street (1984), A Nightmare on Elm Street 2: Freddy's Revenge (1985), A Nightmare on Elm Street 3: Dream Warriors (1987), A Nightmare on Elm Street 4: The Dream Master (1988), A Nightmare on Elm Street 5: The Dream Child (1989), Freddy's Dead: The Final Nightmare (1991), Wes Craven's New Nightmare (1994), Freddy vs. Jason (2003), A Nightmare on Elm Street (2010)

3. Transporter - The Transporter (2002), Transporter 2 (2005), Transporter 3 (2008)

Series I'm embarrassed to have seen all of:

1. Left Behind - Left Behind: The Movie (2000), Left Behind II: Tribulation Force (2002), Left Behind: World at War (2005)

2. Harold and Kumar - Harold and Kumar Go to White Castle (2004), Harold and Kumar Escape from Guantanamo Bay (2008)

3. Saw* - Saw (2004), Saw II (2005), Saw III (2006), Saw IV (2007), Saw V (2008), Saw VI (2009), Saw 3D (2010)*

* - I have yet to see Saw 3D, now called Saw: The Final Chapter. But I thought having seen six of the seven Saws was embarrassing enough to be worth including.