+1 Responsive design. That's essential these days as far as I'm concerned, more than half of my visitors use phones and tablets but there's no way I will allow Tapatalk near my site.
The notifications center looks good too, I haven't had a chance to install a local copy for testing yet so could someone tell me if it includes moderator notifications (posts awaiting approval)?
A few of the little 'tweaks' I've added to 3.0 are now included as standard so that will reduce the number of extensions needed.
How does 3.1 compare to 3.0.12 on CPU usage?
Never argue with idiots, they will drag you down to their level and beat you with experience.