Hmmm, can't think of many weird smells I like, but I do have a strange joy in the feeling of having a filling packed in your tooth. Something about that squeaking that goes all the way through your skull as they smash it in and mold it into place, but maybe that's just something I had to develop a love for by being a fat kid who ate tons of candy and would only brush my teeth 1-2x/week and would routinely need 4-8 fillings a year from how fucked up my mouth was.
I've changed, but then again, I also have about 15 crowns where actual teeth used to be, you can only fill in so many spots before that shit just gets capped off for good.
But I do miss that feeling, might have to ask the dentist if I can pay extra to have him do it, pull out the first round, and do it again just so I can feel it twice.