What hasn't yet been addressed is that chimichanga is featured in the recent Deadpool film, and in that canon there's no concept of him not liking them. It's obvious that the references in the movie were built on the running joke from the comics, but it's a fair guess that only a small percentage of the people who've spent 3/4 of a billion USD would be familiar with the panels provided in other answers.
Due to the enormous popularity of the film, and the chimichanga references throughout, I would guess that it was meant to appeal to not only Deadpool comic fans, but to fans of the movie (or just the movie).
See this exclusive postcard included in the special red-cased Blu-ray of the film, that people like myself received:
Picture included so that my answer isn't the only one without them.
And finally, accurate or not, I think most people still don't give a damn.