Perhaps I'm childish, but I like the little box on my profile which tells me how much reputation I've gained since last looking at my reputation tab.
It's pretty and green and fills an otherwise empty expanse. The problem is that it's making me not want to visit my reputation tab as I don't want that green box to disappear.
Instead of reputation gained since your last visit to the reputation tab, which doesn't really do anything for me other than make me not want to go there, I think it'd be nicer if it was instead reputation gained in the last 30 days. This way it'd never reset (well, you know what I mean), and it'd encourage myself and others to continue to actively participate. This would also work well alongside the chart and top n% this year text.
After accidentally visiting my Reputation page shortly after originally making this post, over a year later and I've still not visited it again...
Hello from 2017!