When creating an activity and adding users or attendees (internal or external) - you have to type the name then switch to a mouse and click to select. I'd love to see a way to add attendees entirely from the keyboard or entirely with a mouse so you don't have to switch.
+1 to this request. I would like to also add that we enable keyboard commands/shortcuts when searching for a customer as well. It gets quite tedious having to switch back to your mouse to select the customer after typing the name in the search window.