Funnily enough I have a pet peeve with Grafana's picker (which is overall quite nice) - I can't copy and paste the whole date range from one window to another in one go. I'm often punching in varies specific datetime ranges across multiple dashboards so this comes up all the time every day. Sure I've added data links for the cases that I use most frequently but I can't do that for everything. The "recently used ranges" (which is a neat feature) doesn't seem to work across dashboards and seems to require a page reload which baffles me a bit.