I don't miss mine much and he was wonderful. I think it has to do with the amount of personal engagement we had with the person, how much we miss them? I miss my father-in-law more than I miss my father I think.

I mostly miss my childhood father, his caretaking self and some conversation but I didn't "need" him for anything for 25-30 years? I don't know if your mother is still alive but that influenced my grieving pattern too, having my stepmother still alive and tending to her, etc.