When you defend the blinds it depends on a few things. The first thing is the position of the raiser, if he's in the button you can defend with a wider range than you can if UTG raised. Also, it depends a lot on the player. If you've been at a table for a while and someone raises everytime you're in the BB you can start to widen your defense range because you know that most likely they're trying to steal the blind from you. I think a good defense range against anyone that you don't really know how they're playing is something like 55+, Axs, and high suited connectors because they have higher implied
odds and can flop really nice
hands that can really dominate the villians range from MP or LP. 3betting from the BB isn't something I do a lot except with top hands mostly just AA, KK, AKs/o simply because you most likely will be playing OOP the rest of the hand and you don't want to put to much into the pot preflop and risk having to make tougher decisions post flop and beyond.
With all that being said if I have bad cards (ex: 72o) I don't have a problem folding to aggression because you can make a lot more money in LP than you'll lose getting your blinds stolen here and there.