It confuses the hell out of my friends. I can gain energy from both, and I go from bouts of energizing company to locking myself away. This would also reflect on forums in that I would have periods of posting a lot, and then go silent. This also reflects on tests I take, which tilts towards one or the other depending on my mental state, always roughly 40-60%. It is really quite tedious. Gives my IxTJ friend a headache, who himself is heavily introverted consistently.
"A life that lives without doing anything is the same as a slow death." - Lelouch Vi Britannia