I had something of a hermiting phase for nearly 2 years -- my interactions often centered around friends which would come over once in awhile to game or watch tv and movies, as well as drink and throw house parties. I'd say that 95% of the time though, I was alone.
My house was clean but I had periods of messiness, with neat, peripherally organized stacks of printouts of various articles related to the MBTI, Enneagram, Socionics, HTML, guitar tablature and various other topics of interest.
My interests consisted of reading reading reading, writing, drawing and creating (I achieved a certain type of brilliancy modding a game called Battlezone 2).
During this time I lived mostly inside of my head. I listened to bands like Dream Theatre. I had a cat.
My days were punctuated by various moments: moments of elation, moments of sorrow, moments of lonliness and inner exploration. At times it felt like I was on to something. My introverted intuition would run in the background when I would suddenly be struck by an 'Ah! Hah!' moment. Immediately journaling it, and in some cases posting my findings.
In my head, I played out various dramas and scenarios. There were certain times when the night felt electric, and i would sit outside or walk around the neighborhood and take in the stars, the northern lights, the fires, the smell of the air. There were sunsets that I would watch, strumming away at my guitar.
Of course nothing is ever perfect, I went through terribly depressive phases; times when I wanted to shut everyone out and just be by myself. I spent over a month mourning for an unrequited love which was one of the most painful experiences of my life, but allowed me to experience a certain type of growth. I had brief periods of abject loneliness and despair.
There were times when I felt I was on to something. Times when I felt presence, being. Times when I got out of my head and shut the thinking aspect of my personality, to exist in periods of what seemed like bliss, and at the very edge of sanity -- lucidity, flow. It came once in awhile and it went.
In these states, I would journal -- and since my I was a web designer/developer I placed my journal on my own private forum system that I had running on my computer (the forum works out well for journaling various topics). I wrote about various topics of intellectual interest. When my normal 'thinking' state returned, I felt embarrassed at what I wrote -- and in some cases retracted or withdrew some of the postings I made public. (Years later, I would discover that many of these things were accepted as truths, or had a certain amount of evidence supporting them).
Of course I had my odd little habits. One of the things that I was fascinated by was the martial arts. To me, the martial arts WAS a form of art -- the art of physics, the art of tao. And I spent a lot of time attempting to control the forces of my body to achieve a precise motion based on utilizing existing momentum and flow. At best it was performing katas and studying my physical limits -- at worst I would test out the 'perfect strike' by using the end of a staff to shatter old junky video tapes into several pieces by using a well placed strike which distributed all of the force of motion to the smallest possible area of the stick.
Part of me liked being the part of the eccentric loner. A part of me still desires to disconnect from humanity, right now i'm trying to rid myself of that desire -- but its so difficult, because the social organ atrophies if it is not nurtured.
Overall its an interesting experience, and can affect one in profound ways -- some of them positive and some of them negative.