WARNING: lame personal story. Proceed with caution. This is not 'depersonalization' as a clinical symptom, just relating my personal story to the topic. I do not mean for illogical/lack of sense to = feeling. 'Feeling' is still a rational function. The conclusion and below is the most relevant.

ersonal story starts:
Depersonalization (in the non-clinical, detached sense of the word) has really saved me. As an NT and an young adolescent, I would often have very surprising attacks of emotion. It was as if I was discovering emotion for the first time, and I felt I had absolutely no control over it. I basically hated the world for not making sense, so I lashed out at everyone (especially authorities). I'm still very uncomfortable even thinking about this period in my life. -hopes that someone relates- -rationalizes that hope as occurring from the inferior Fe function need to fit in-
After a few years, I had an epiphany. Well, it was more like a 'paradigm' shift (depersonalization). Even if people and societies don't intrinsically make sense (everyone having emotions and being prone to lapses in judgement), they are logical in the philosophical, big-picture of the universe. Determinism gives meaning to the illogical. It's obviously not as simple as discovering the theory of determinism, but it's a good way to explain the feeling. I can detach from drama and complicated relationships. The emotions are still there, but they actually come up less often since I view everything with a different lens. Everything just feels less real because I'm not having to deal with the same things anymore. In that way, my experience feels very depersonalized.
:End of personal story:
Conclusion: Detachment doesn't have to mean being disconnected from all of your emotions. You can detach from experiences and still be grounded to your emotional experience. It's all about having the ability to come back to 'reality'. No one can ignore their personal or 'outer' reality indefinitely.
NT's probably like the feeling of objectivity from depersonalization because they can 'ignore' their emotions for a while. I hate admitting it, but I do still have a bit to learn about emotional control. NF's would probably hate it because their main functions involve Feeling! How lost I would be if suddenly I could not judge things based on my internal logic framework! Holy crap, long post. Congrats to whoever gets through it