Uninstall Flash Player now and notice how little you're missing. All your favorite sites have quietly replaced Flash with HTML5. HTML5 is the new standard.
Flash Player is generally the #1 security risk on the typical home PC.
Most if not all major browsers have quietly disabled flash by default. You have to take steps to turn it on, and then Chrome (maybe others?) will warn you every time it's opened.
And after that, additional steps are required before flash content will play.