Hmm. My mind feels constantly ablaze but it's surprisingly difficult to explain what actually goes on. Having scholar casting, I usually find myself researching personal interests. But I guess as I described my thoughts once as thinking about people and emotions, moods, psychological meanderings, fashion/style, history, literature, time-periods, architecture, art, etc. I'd say everything has the tint of being primarily psychological, humanistic, and mostly is in reference to My Self, which I think is mostly from being a mature soul in passion mode. Otherwise, I do look at my environment or "environments of the past", colors, shapes, people, energies, patterns of life... observational, then taking those things/people in and thinking about them.
i.e. I am affected by my environment, emotions and history, so then find myself wanting to get a lot of information or images on those things/curiosities.
I'm also always thinking in terms of self-actualization, and of trying to have more emotional awareness and to enjoy the vibrancies of life, liking to know how my emotions function, analyzing how I feel or have felt in the past. I also like daydreaming of developing and living my own lifestyle (or 'mastering' one). Being myself. I also think of what I want to put out into the environment, of what people will see when they see me, qualities, how I can influence my space/environment or the spaces of others.
So possibly, my thinking boils down to: how I influence things-environment-people and how things-environment-people influence me.