I have a strong preference towards the title being an actual question.

Take for example this question, which began with the title Ampliyfing Wireless Signal. From here it looks like a mundane question about boosting your wireless signal. It's entirely valid and fits the question well. After changing the title to How can I get a wireless signal inside a walk-in freezer?, which is what the question was really about, it drew interest and gathered around 20 upvotes for both the question and top answer.

Super User, being a Q&A site, is interested in two things: questions and answers. Mere titles are markedly less interesting, in my opinion. Most potential answer providers understand a broad array of subject matter, and seeing yet another WiFi question is boring. Getting a wireless signal inside a freezer though? That's interesting.

Putting your question in the title also forces you to clearly state and understand your question. If you can't sum up your entire question in the title, do you really know what you're asking yet? I'm sure there's some edge cases where it's difficult to state your question in a single sentence, but for the majority of questions I'd be willing to bet there's a good single sentence question, and the rest is just about filling in details.

Regardless of whether you "should" put your question in the title, doing so always makes sense.

I have a strong preference towards the title being an actual question.

Take for example this question, which began with the title Ampliyfing Wireless Signal. From here it looks like a mundane question about boosting your wireless signal. It's entirely valid and fits the question well. After changing the title to How can I get a wireless signal inside a walk-in freezer?, which is what the question was really about, it drew interest and gathered around 20 upvotes for both the question and top answer.

Super User, being a Q&A site, is interested in two things: questions and answers. Mere titles are markedly less interesting, in my opinion. Most potential answer providers understand a broad array of subject matter, and seeing yet another WiFi question is boring. Getting a wireless signal inside a freezer though? That's interesting.

Putting your question in the title also forces you to clearly state and understand your question. If you can't sum up your entire question in the title, do you really know what you're asking yet? I'm sure there's some edge cases where it's difficult to state your question in a single sentence, but for the majority of questions I'd be willing to bet there's a good single sentence question, and the rest is just about filling in details.

Regardless of whether you "should" put your question in the title, doing so always makes sense.