This one is almost embarrassing to me because, to explain, I'll have to tell on myself and its
One day, I was overcome with frustration which hubby had never seen before. We were raising grandkids and they would never listen to me. I asked him what I was doing wrong that they wouldn't. He said: "You're not mad enough." Well, the next day, when alone, I stood in front of the mirror and practiced angry faces coupled with the angriest voice I could muster. I practiced almost daily for over a week and then the need arose and I used it. Both kids laughed at me... I mean they really cracked up! I was so embarrassed. (when I quit laughing) I told them, okay, you're just going to have to accept that I don't get mad... but I do get even.

And that was the beginning of new relationships. I found that's what works on hubby too because he was already programmed to respond to anger... so since I can't do that... I go buy a new fridge or something when he steps on my toes too much which he doesn't do very often.
I have been mad a few times in my life and I don't use the word lightly. It is madness... I can't think and can barely speak. It is something I avoid like the plague.
You know what... it was so traumatic for me, in remembering, I lost what the whole subject is so I'm going to read and will come back if I haven't covered it.
Okay, I'm back. I'm so unfamiliar with emotion that I can't even think what they are. Happy? Yes, I laugh at humor... does that qualify? But, mostly, I relate to it as more contented which is mental for me I think. Grief, yes but it has to be something really bad like someone or a pet dying.... 9/11 and loosing comrades in the service did it. Fear, yes, but again it has to be really threatening to a loved one or myself.
Like you, mostly mine are only "skin deep." I've only felt them intensely a handful of times.