I would love to run across town alongside Ferris Bueller with The English Beat playing in the background.
This, with me in the Marcel role.
The final scene in Casablanca, with me in the Humphrey Bogart role:
Rooster Cogburn facing down Nasty Ned Pepper in the finest movie ever made, True Grit. (Obviously, I mean the original version).
Me being Swan in the fight scene with the Baseball Furies in The Warriors. Although Ajax gets the better line (“I’m gonna shove that bat up your ass and turn you into a popsicle!”) but Swan doesn’t get busted by the cops. And Swan gets the girl (unlike Ajax).
I wouldn’t mind hanging out with Hemingway at that party from Midnight In Paris.
Or maybe I’d be Roger Moore at the end of For Your Eyes Only and go for a nude swim with Carole Bouquet.
Yeah, the second one.
The fireworks scene in To Catch a Thief, with me in the Cary Grant role:
**Frances Stevens**: Even in this light, I can tell where your eyes are looking.
[fireworks]
Frances Stevens: Look, John. Hold them. Diamonds… The only thing in the world you can’t resist. Then tell me you don’t know what I’m talking about.
[fireworks]
Frances Stevens: Ever had a better offer in your whole life? One with everything?
[fireworks]
John Robie: I’ve never had a crazier one.
Frances Stevens: Just as long as you’re satisfied!
[fireworks]
John Robie: You know as well as I do: this necklace is imitation.
Frances Stevens: Well, I’m not.
[kiss, fade to black]
I’d like to do the scene with Eowyn saying “I am no man!”
Or, if I was a man, I’d like to be Harrison Ford in the Last Crusade, coming to attention before Hitler and getting away with it.
I’d like to attend Bilbo’s going-away birthday party.
There’s probably plenty more (involving some sexual/romantic scene)s but that’s what first came to mind.
Since my wife will probably stalk me and read this, I’ll go with the James Garner role in the final racing scene in Grand Prix.
Do you mean if I was an actor, what scene would I want to play?..or
If movies were real life who would I like to be/what scene from that life would I like to live out?
For the former…, Zeppo Marx, Night at the Opera, final scene–just to observe the madness.
For the latter…, CK Dexter Haven in The Philadelphia Story, penultimate scene, where CKDH gives her the engagement ring and bracelet, etc, etc. Definition of Paradise Regained.
The final scene of High Noon, when Gary Cooper leaves to ungrateful wretches of Hadleyville to a future of fucking Grace Kelly’s brains out. Which is very possible Coop really did, as Grace was infamous as one of the most promiscuous women in Hollywood history. And name me a straight man (or gay woman) who wouldn’t nail Grace Kelly if given a chance. 
I picture a lot of Dopers getting seriously injured or killed in this thread.
I want to be at the Moulin Rouge! to see the Diamond Dogs, the Can Can and see Satine come down from the ceiling in the swing. It’s much safer.
In an X Wing, heading for the Death Star
Why suffer a pale imitation when you could be Guy Gibson in the original?
I would love to meet Marian, the Librarian at the footbridge after spending a summer in River City
With my luck, I’d be Porkins.
Close. Bogie as Bacall asks him if he knows how to whistle.
