If only I could select more than one.
I love to bite (however hard they want it, although its starting to get difficult for me to do anything super gently) and scratch, and have scratched so hard I've drawn blood, and bitten so hard I've left bruises. I actually often consider it a shitty bite job when there are no bruises.
For me however, I don't have quite the tolerance for anything super hard, although I bruise pretty easily and so on the scale of "not at all" to "so hard it bruises" i still fall on the top end of that list, but my scale is a bit tamer than other people's. There is such a thing as too hard of a bite, when I'm being bitten. When I'm the biter, that's definitely not true!