What do you think are the most favorite programmers' questions

on Stack Overflow?

Sure, these are mostly offtopics. Some of them are about book recomentadions, other - regarding a language hidden features and some look even more prominent than that. My 3 top of the overall favorites would be:

What's your most controversial programming opinion?

What is the best comment in source code?

What is your best programmer joke?

As you could notice all of them are of the project beginning time and these kind of questions aren't welcome any more.