It's a repeat, but so what. I love films and I love comedy - comedy films are okay as well.
My top 10 from the list...
01. Planes, Trains And Automobiles
02. Young Frankenstein
03. Trading Places
04. Stir Crazy
05. Monty Python's Life Of Brian
06. The Jerk
07. Blues Brothers
08. South Park: Bigger, Longer & Uncut
09. Airplane!
10. There's Something About Mary
Based purely upon 
rather then thinking about the writing and other geeky things we obsess over.
What? No Holy Grail in your list? This is comedy blasphemy.
I'm bored of that film now. Yes it is great, but I can't bare to watch it anymore!
NI!!
It was great when I was 15, watching it all the time and quoting it, but I'm just a bit sick of it now.
1 - Life of Brian
2 - Holy Grail
3 - Shaun of the Dead
4 - Austin Powers
5 - Naked Gun
6 - Hot Fuzz
7 - BASEketball (soooo underrated)
8 - Jay and Silent Bob: Strike Back
9 - This Is Spinal Tap
10 - Stir Crazy
11 - Whitnail & I
12 - Full Monty
13 - Wayne's World
14 - There's Something About Mary
15 - Meet The Parents
1: Man in the Moon
2: Mash
3: The Gods Must Be Crazy
4: Ishtar
5: Young Frankenstein
6: Blind Date
7: Skin Deep
8: Shaun of the Dead
9: Life of Brian
10: Start the Revolution Without Me