Most ISTPs mistype as Rationals. I use Ti-Ni to a much higher degree, yet I'm too here-and-now, hyperactive, and definitely not curious enough. I don't use my Se often at all, but I gain a lot of information and often have epiphanies because of my experiences.
I don't know if I just lived in a very SJ/NF environment, or if I was too much of a loner, but before I discovered I was an ISTP, I never thought there was a soul out there like me. I'm still always surprised when I read ISTP Wiki or read comments on this forum because it seems like I wrote them myself. I love philosophizing, exploration/discovery, reading, writing, and sharing my ideas, and I do these things on a regular basis, but I never belonged in the stereotypical "nerd" or Rational category. Unless something pertains to a subject I care about, or it's useful and relevant, I won't stick around to listen.
Which brings me to my question: Are we really all that common? Why have I never met anyone like myself? Am I just a weird breed of ISTP?
Side note: I've never really liked Math and Science all that much. I'm not sure if it's because no one else ever piqued my interest in it, or because I don't find it useful. Rationals tend to be curious about everything regardless of stimulation, no?