A massive anti-pattern when dealing with Ajax calls in javacript is to send in a success parameter into the ajax options.
Of course a better way would be to move the callback to another function (reusable).
But this is still hard to read - your callback is now hidden as a one liner. I myself prefer to use the done function in ajax callbacks (added in version 1.5)
It’s still not really any better, we only really deal with the callback from inside the data call code. What I prefer to do is return the deferred.
For me this code reads much nicer, done is now near the code we requested the data, and not in the “plumbing class” that actually deals with the ajax call.