I can't for the life of me think of something I want to set a boundary on in my sitch, with H. And I don't want to start setting boundaries just for the sake of setting boundaries, surely that isn't the emotionally healthy thing to do.
Healthy boundaries are set (and enforced) around areas that -- if violated -- harm your (or your family's) core personal integrity, or your (or your family's) physical or emotional health, or your finances. So then either one of two things is going on, or in some combination:
1) There really are no things in which your husband is causing you any physical, emotional or financial harm; or
2) The very fact that you can't see or think of any might be indicative of part of the problem (denial).
I honestly don't know enough about your sitch to say which it is, but I would urge you to dig deep and do some soul-searching on this as it's rare (ever?) that I've seen anyone on here who can't see two or three core things from which it would be healthier for them if they'd learn to protect themselves.