I do (even as a sometime Flash developer), but unfortunately it's not always practical. There are plenty of sites, including Vimeo embeds and Vine, which cover the SWF with an HTML element - making it impossible to right-click to play the SWF. So you end up disabling click-to-play just to see the video you wanted.

Firefox has had a top-of-the-page notification for click-to-play for a long time, making this a non-issue.

Chrome has an icon for this in the address bar. The only problem with this solution is you lose control of which elements you want to allow.

I think Firefox's top-of-page notification is just for Flash content that is not large enough for the inline "click to play" UI. It's pretty annoying, though, because it causes the whole page to shift down. Chrome's address bar icon sounds like a good alternative.

Does anyone know why Vimeo does that? I refuse to disable Flashblock to use Vimeo, and I don't understand how requiring me to do so would benefit them.

I use Chrome Canary, which doesn't have flash at all, and it seems that most sites automatically switch to HTML5.

Sometimes I'll go to a site in Safari or Chrome and and the flash won't play, but then I load it up in Canary and it works. I don't understand why those same sites don't just start with html5 if they already support it anyway.

Chrome Canary has Flash. Do you mean Chromium?

No I mean Chrome Canary. But I've messed with the settings in chrome://flags/ to disable it and enable default html5.

Back when I still have Flash installed, I turned off Firefox's Click-to-play because I was unable figure out how to have it on without something like a speech balloon's popping up in the upper left corner of the window every time I visit a page that wants to use Flash.

I have a low tolerance for distractions and for anything that resembles nagging.