I also care.
Also care.
I don't know why they made spells that only have yourself as a target need to cast and then target yourself. Hellish rebuke should just automatically apply. To get it to work cast and then select yourself. Only works on certain sorts of hits -- if you are pushed for example it doesn't kick in.
It works like that so that you can't accidentally hit the wrong key and waste your action on a buff you didn't intend to cast. Or so that you can click on it and still think about if you really want to go forward with it.
I'd rather it be like this than the reverse. Especially since I have a tendency to forget what keys do what after I re-arrange everything on level up and need a little time before I fully remember where I put everything.