Dear gmail: give me a way to act on an email (“Like”, “Thanks”, “Will Do”, etc) by just pushing a button. Let me configure these myself. If the original sender is a gmail/Google apps user, actions can just appear as attributes of original message with a browser notification if that’s what the sender is configured for. If outside, or if the sender wants message notifications to continue, go ahead and send the person an email for me.
But don’t make me type these things out a hundred times a day.
Even better–you could give me the option to white-list individuals to turn their messages into Google+ posts instead of emails from my perspective and I can just +1 them from there.