This category is harder than I thought. Like most of us say each week, there are too many good choices.
*Back to the Future I-III probably falls more into this list than my sci-fi list, but I've already used it. If I did rank it, it would be my #2.
Ghostbusters: I can sit down and watch this movie anytime, quoting my way through virtually all of it. I ain't afraid of no ghost. A classic to me.
The Princess Bride: Has it got any sports in it? Are you kidding? Fencing, fighting, torture, revenge, giants, monsters, chases, escapes, true love, miracles... Doesn't sound too bad. I'll try to stay awake. I was saving this movie for a possible "Fantasy" category, but it's really a comedy. There's so much charm, adventure and humor in this movie. Every character is memorable, as are many of the lines/scenes. I love it.
Raising Arizona: My favorite Cohen bros movies. Nicholas Cage & Holly Hunter are terrific and the rest of the bizarre cast is just as good. It ain't Ozzie and Harriet, but it's one heck of a crazy, funny ride.
Young Frankenstein: A Gene Wilder and Mel Brooks classic. Probably my favorite Brooks movie? The spoof of old horror movies is spot on. Wilder, Feldman, Boyle, Kahn, Garr and Leachman are gold.
Ferris Bueller's Day Off: I am a child of the 80's and this is a fun 80's "coming of age" movie. The fantasy of "let's totally blow off boring school and have fun in the city" is compelling. Lots of memorable lines, fun scenes, a little bit of growing up, and a lot of getting away with it.
School of Rock: Aside from Kung-fu Panda, this is my probably my favorite Jack Black movie. He's at his "enthusiastic wannabe-Rocker" best in this movie. Lovable loser becomes a lovable teacher... sort of. What are they teaching kids these days?
40-Year-Old Virgin: More crude humor-wise, but still a funny, and surprisingly sweet, movie. I've liked Steve Carell since The (American) Office.
Coming to America: Eddie Murphy and Arsenio Hall steal every scene in this movie, and they're in virtually every scene.
Anchorman: The Legend of Ron Burgundy: That escalated quickly! I'm not always a fan of Wil Ferrell movies, but this one (and Elf) are my favorites. A goofy, satirical movie with lots of fun performances.
National Lampoons: Christmas Vacation/Vacation: I think both of these movies are great, but Christmas Vacation edges out the original. Not only is it funny, but it also develops the characters a bit more, and has some very sweet moments.
Honorable mentions. There are so many good movies that deserve to be on a top 10 list. Again, I know I've missed some good ones I really liked:
Ace Ventura: Pet Detective (Classic Jim Carrey. Allrighty, then!)
Airplane!
Army of Darkness (Groovy)
Beetlejuice
Big
Big Trouble in Little China (Love it!)
Blazing Saddles (My second favorite Brooks movie)
Clue (Such a good cast. A fun movie.)
Crocodile Dundee (I liked this movie back in the day, but I guess I kind of forgot how much I enjoyed it. I should go back and watch it. It launched a huge Aussie craze in the US. G'day!)
Dodgeball (If you can dodge a wrench, you can dodge a ball)
Groundhog Day
Groundhog Day
Legally Blonde
Monty Python and the Holy Grail (I was only a casual Monty Python fan, but I did enjoy this movie. Such a great satire and
Mr. Mom (220, 221... whatever it takes)
Mrs. Doubtfire
Peewee's Big Adventure (I'm a loner, Dottie. A rebel.)
Spaceballs (third favorite Brooks movie)
The Royal Tennanbaums (I was really tempted to put this in either drama or in comedy, and I settled on comedy. An very interesting movie and my favorite Wes Anderson film. All of the cast is good, but Hackman is great, like usual)
The Three Amigos (So many good lines and scenes... maybe it should be on my list)
Twins (Arnold can be funny, too)
Zombieland (A fun zombie spoof movie. It's time to nut up or shut up.)