People can only vote 40 times a day. Now when upvoting a question and you're running out of votes, the system warns you: "You have xx votes left today"
However, if you downvote, the system always says (at least if you don't have too much rep): "Please consider adding a comment if you think this post can be improved"
No matter if you have voted 35 times or more already.
My proposal is to give the warning a higher priority than the comment notification, so that if you do run out of votes, you will see the "You have xx votes left today" warning instead of the comment notification.
The reasoning being that if you did vote 35 times or more today already, you may also be aware that the system wants you to leave a comment. While you may not be aware that you're running out of votes.