I would argue against question titles.
They make all questions look the same, and force readers to loose time on insignificant words before getting to the point of the title. While it might not sound like a huge problem, it waste a lot of time when browsing long lists of questions (for instance when scrolling the home page or search results). They are also less catchy on Google/etc results, which is a hindrance to our site's popularity (and thus we get less experts than we could).
Bad: Is there a Chrome extension that I can use to note why I have opened a tab?
Good: Chrome extension that I can use to note why I have opened a tab
Bad: What is a newbie-friendly graphical Git client for Windows?
Good: Newbie-friendly graphical Git client for Windows
Bad: What software solution can I use (on Windows 10) to keep all my non-Microsoft software up to date?
Good: Software solution to keep all my non-Microsoft software up to date on Windows 10
Bad: Free newsletter software for a small business?
Good: Free newsletter software for a small business
Bad: What PDF viewer will allow me to quickly view which elements are vector?
Good: PDF viewer that allows to quickly view which elements are vector
By the way, I would also recommend against imperatives and polite words:
Bad: Please recommend an Android game which encourages me to move around while I play
Good: Android game which encourages me to move around while I play
And against using the first person if possible (ex: I, my, we, our):
Bad: How can I share my clipboard across my devices?
Good: Share clipboard across devices
I would say that editing questions to fix titles in that way is OK, as it is quite important for our site. Newcomers learn mostly by reproducing what they see, so it is important to fix at least our most viewed questions.