For me it's surely ENTP.
Short key to finding type per theory:
-what develops first (age 5-15) is your first cognitive function. S/N can be mistaken at this age.
-Second function comes at age 15-25, give or take a few years.
-third comes to full effect even more gradually as the first two, from 25 to 35, usually
-fourth starts at age 35..50, or perhaps later, or never. Perhaps a bit sooner for some individuals.
So, why ENTP for me?
-extroverted and outgoing in childhood, not reserved in innovations or physical things, but very much reserved in talking or socializing. Not keen on thinking or feelings. That's Se or Ne first.
-youth: hard thinking. Ti. That's a clear one.
-young adult: Fx. Some feelings came up.
-adult, seen some life: S/Ni. Ideas of long-term effects, understanding the value of systems and/or tradition.
ENTP is a best fit for me.
So, share your type per function development theory, analyze and tell it, or help someone else find it =)