Detachment

MINOR SPOILERS for Things Are Alive.
It is not a rare thing for me to get into stories that make me question my own morals, if what I think is really the way that a normal mind works. Now comes the show known as Dexter (and I'm not talking about the one who has a laboratory.) The character of Dexter has a disconnect from emotions and constantly refers to himself as a monster. He also talks about a line of morals where he will only kill those who are "evil" and as it has got me thinking it has brought up a certain story and character from said story that I'm working on. Sadly I can barely talk about it being in the process of the serious story outline (and it is by far kicking my ass the hardest of all my stories.)
Chances are if you're reading this blog post you've read Things Are Alive and possibly it's sequels (maybe even Meeting Vinyl.) It's probably becoming clear that I loves me some OctiScratch writing. Now think of Octavia in Things Are Alive; she's vulnerable, scared, and oh so nervous. I find this fun but it's such a common way of seeing her. Now we have Vinyl Scratch; head strong, forward, and excitable. Again a lot of fun to work with but always the way she seems to be seen.
Now this is where I'm going to explain half of my logic on what I'm going to explain at the end of this; I read a fiction, the story is called A Knife in the Dark by NorsePony. In this story our author has placed Octavia as a mobster with a talent for violence, especially with a knife. It also casts Vinyl Scratch as a fellow mobster whose talents align more with being stealthy and finds herself drawn towards violence caused by Octavia.
Now for the part where I make the connection to Dexter; on the outside he has learned how to act so that society accepts him. Octavia is a renown mare for sophistication and as contrast Vinyl Scratch is renown for her over the top stage persona of DJ Pon-3. What if that's just how they seem so that they can be the best of what they do. If you are a part of an orchestra then there comes an air of sophistication to it, where as DJ's (myself included) do better when trying to please a crowd if their energy can bring people up to a standard of joy or excitement. What if though that's not exactly how their personalities are; I'll use myself for an example.
I love electronic music (among other genres) and have found myself enticed by the desire to DJ, but here's where a problem comes into play. My personality is based in the concept of being introverted (basically I feel like myself in solitude,) I myself don't have to take on a stage persona but I feel that when I get real chanced to DJ that I'm going to subconsciously, because that's how I perceive DJing as an art. In that line of thought it's not hard to imagine that over time you will notice that you're doing it but not having the will to change it (for whatever reason) and it becomes a mask when you get up at the turntable.
Basically you detach yourself from all feelings to put on a show for the crowd, society, family, etc. The question I have is "detachment" a good thing or a bad thing?