My no-questions-asked favourite movie when I was growing up Laugh out loud from start to finish, an absolute classic, in my book at least. Murray was the perfect casting as Bob, a paranoid over-grown child who follows his doctor, Dreyfus, to the family holiday home. Love the bit where the two first meet, love the bit when Dreyfus finds Bob at the lake place, love the boat bit, love the death medicine bit, love the swimming bit, love the chicken bit, love the mental hospital bit, love Dreyfus birthday bit, love the Good Morning America bit, love it all, really. The set on the lake just adds to the laughter somehow, such calming scenery and then there's Bob, sending it all to hell. I'm laughing right now just thinking about it.
There's so many good ideas in this movie. The script is inspired, fast paced and extremely well thought through, someone spent a lot of time in the thinking chair.
You could argue that the films downfall is it's a bit immature, but it's obviously not aimed at a mature addience, my dad hated it. If you take it seriously it won't work. Loosen up, get some popcorn and tell the neighbours your watching the best comedy of the early '90's, and they'll understand why the ambo's are on standby ready for you to choke on your popcorn in laughter.