INTPs: The warm robot; awkward about emotions and expressing themselves properly. They are cautious about everything (unsure of making any commitment before thorough thinking), and as a result, they have this innocent aura about them. I view INTPs as the least cold of the three.

INTJ: Uptight hardasses (a bit of a stereotype, but couldn't help myself;) ); want to organize and kinda have some form of control over everything. If you aren't efficient in your hobby, major, or whatever else you may be doing, then fuck you - get that shit together. I see them as being coldest of the three.

ISTP: The adventurous (result of Se). They are somewhat similar to INTP due to the dominant Ti/extroverted Fe, however, the middle functions are entirely different. As a result of Se, they will likely want to get out and about more often to sense there surroundings in a prolific way. They will be more inclined to sports, or anything that is kinda on edge. Overall, ISTPs can be fairly laid back provided they don't get too stressed. I would say they are like the less awkward/more adventurous version of the INTP.