Ctrl+Shift to activate hand tool
Balsamiq mockups uses the ctrl +scroll keyboard shortcut to zoom in and out. Then by simply adding Shift to that, I can click and drag my canvas around. So Ctrl+Shift+click does the same thing as Spacebar. Why is this useful? I don't need to move my hand from the Ctrl Key over to the spacebar to move around! Adobe XD feels clunkier because it's missing this AWESOME keyboard shortcut. If you don't believe me, try out Balsamiq mockups and tell me that isn't easier.
What's worse, is that Ctrl + Space is already a shortcut, so I find myself accidentally hitting this Ctrl+Space shortcut when I just want to unselect Ctrl and then press space and then move around my board.
Again- try out balsamiq if you don't believe me. I want to love Adobe XD as much as I did Balsamiq :)