Sorry, I never answered the OP.
It depends on the type of emotion, I think. One thing about me though (which seems to be consistent with INTPs) is that I don't want to change my emotion. If I feel angry, or if I feel sad, I don't want to try to lie and say I'm not. My emotion is my emotion and it has to be examined and dealt with... and I typically deal with it by diving into it inside and exploring it and merging with it.
So it can be a very introspective process.
Similarly, when I'm sad inside, I like to resonate with it. So I'll listen to music that reinforces it rather than trying to change it. I get in tune with feelings by surrounding myself in similar ambiance -- music, surroundings, movies, books, particular settings. I love dark, bittersweet movies too.... Dark City, Pan's Labyrinth, Sunshine, even Silence of the Lambs ends with this weird hauntedness... I soak myself in internal emotion and let myself go.
External emotions are a bit different. The earlier process I described is how I deal with internal emotions, not external emotions (which are emotions that are being directed at me in my environment, or emotions I am afraid I am going to release uncontrollably into the environment). If I'm being hit by too much drama or external emotion from others, I need to typically get out... or engage in a way that diffuses that emo-drama. If I'm afraid I'm going to blast, I typically like to get alone somewhere, and if I can, I try to calm myself with a distraction, or I find a safe place to release that anger.
(I remember times when I would get into a battle with spouse for a few hours at a time -- this is years ago, and we were both very stubborn sometimes -- and after all that fighting, even while we were still arguing, I'd be stomping around the house, cleaning up wildly, doing dishes intensely, I was like a madhouse of cleaning energy.... and part of me was laughing insanely at myself because it was so hilarious, since I'm usually more lethargic when it comes to cleaning... but man, piss me off with nowhere for that energy to go, and the house would be spotless by the end of the fight! I had to get rid of it all somehow before I blew. Another pastime I would use to diffuse anger would be jogging. I would just throw on my shoes, go outside, and run run run until I couldn't run anymore and was exhausted. AT that point, I liked to go out in nature, and lose myself.)
I guess I am exploring this thought as I go, so if I were to say something based on what I just wrote, I would say that safe emotions -- ones that were all internal and resonating with me -- are emotions I want to explore and merge with; dangerous emotions that could quickly create an unsafe environment for me externally, all those emotions would need to be diffused somehow so I could feel stable and in control. Inside, I could feel unstable because I knew I had the space I needed to figure it out and no one else even had to know; externally, I had to keep everything stable.