The "2" style Q really bothered me, so one day I sat and tried to figure out how they "decided" a Q would be a Q, and realized it probably just evolved that way out of need for expediency. Start at the Upper left corner/left side of your printed O for the Q, and when you reach the other side GOING CLOCKWISE (I learned to make O's counterclockwise, but cursive makes more sense to me starting the O for the Q clockwise), instead of lifting your pen move right into the slash. Use a fluid motion instead of a straight line so you can flow right into your next letter. If you do it quick enough repetitively the O opens up and it starts to look more like a 2. Then add a curly at the starting point to make it look fancier. Voila. Cursive Q.
Anyway, the "2" style Q bothers me less now, because it at least makes sense.