There may be real data to back this up, but I'm interested in personal insight as well.
I have been told by a couple of people that INFP is more likely to choose a career in science than INFJ. I couldn't really map that back to the function preferences. Tertiary Ti would seem to be more favorable than Inferior Te, plus having primary Ni would also support e.g., a person wanting to do theoretical mathematics.
(The reason for comparing these two is that, yes, I'm trying to type someone and I'm pretty sure about the first three... )
Love ya NFs!