During the Club of Heroes reunion in Batman comics, when it becomes evident that the world's greatest detectives are trapped on an island with a murder to solve, the Musketeer is quick to note that he wanted to play five-a-side rugby.
The former trope namer is Pixar's The Incredibles. Mr. Incredible and Frozone lie to their wives that they're going bowling, when in reality they're doing secret hero work. They end up in a tight spot and start arguing, prompting Frozone to shout "I wanted to go bowling!"
The Rescuers: As Orville takes off with Bernard and Bianca in tow, Bernard comments, "Sure wish we'd taken the train!" He repeats in the sequel as they're riding Wilbur, "Miss Bianca, from now on, can't we just take the train?" note Of course, since they were on their way from New York to Australia at the time...
Film — Live Action
In Clerks, Dante's day is spent in the purgatory of serving a succession of customers while bemoaning the fact that he is "not even supposed to be here today."
John McClane in Die Hard is huddled in an air vent, thinking about how he's going to try to beat a whole gang of bad guys and why he's even in the building: "Come out to the coast, we'll get together, have a few laughs..."
Independence Day: One character says while kicking an unconscious alien, "I could've been at a barbeque!"
This is played differently on occasion in Calvin and Hobbes by Calvin's dad. "See, if we had gotten a dog like I wanted..."
In an episode of VeggieTales, the sled the characters are riding crashes:
Larry: Bob! Bob, are you okay? Bob: Mousetrap. Larry: Huh? Bob:I wanted to play Mousetrap — you roll your dice, you move your mice. Nobody gets hurt.
Chuckie:* sigh* All I wanted was a nice quiet trip to the museum — no running away from grown-ups, no getting lost, no making trouble... just a nice, quiet trip. But, no, you guys always have to think of something scary. pause Tommy: Chuckie, are you through? Chuckie: Um, yeah, that's about it. Tommy: Then LET'S GO!
Grandpa Lou, when the parents take the babies to the movies to see The Dummy Bears in: The Land without Smiles, responds with this almost verbatim.
In one episode of Buzz Lightyear of Star Command, even though they were given the opportunity to go on vacation, the team still went on a dangerous mission. X-R, the only one who wanted to take up the furlough, continuously stated throughout the episode, "I wanted to go to Mahambis Six!"
Sokka laments in the first episode of Avatar: The Last Airbender , "I'm just a guy... with a boomerang... I didn't ask for all this flying... and magic..."
There's also the time Aang (fruitlesly) tries to tell Zuko that it's a bad idea to pick up "giant glowing gems sitting on pedestals" in a Temple of Doom surrounded by Durable Deathtraps.
Aang: You had to pick up the glowing egg, didn't you?