Uhm, excuse me, but OP said they were older, and eight, at the least, is hardly "every person on the planet". Maybe OP is simply more open to trying things out. Myself, I don't like "dating" and have only ever had two serious relationships that naturally evolved from acquaintances. One that I can't quite type, INFJ???? Maybe? He was so poorly developed, I can't be sure. Anyway, the second is a lovely INTJ. I'm an ENTP and have, in studying type theory, determined that this is the ideal type for me. This does not mean that all INTJs are attractive, (I know one who is a brother-friend) or that no other type is attractive. I merely determined that INTJs are more likely than another type to be a good relationship choice, provided that the bits of them that exist outside type theory are also compatible. If incompatible, I would predict explosions.
Anyway, I think type theory is as applicable to romantic relationships as it is to anything else- that is, it is relevant, but nothing to base the entirely of your decisions on.