I'm going to set aside my case and be open about this Black Cat. I thought about it, and I think ISFP, based on the functions which really are a bit relevant, may be something for you to try out.
I'd love to see what you think and how you'll get a feel for things. You do seem a bit Jeffster-like (minus the half-naked avatars )
Is it that by its indefiniteness it shadows forth the heartless voids and immensities of the universe, and thus stabs us from behind with the thought of annihilation, when beholding the white depths of the milky way?
I think that this might be the case, if I am ISFP-
I grew up depressed in my main stages of psychological development. Depressed and stressed. My mom was insane and in a cult, my dad was getting remarried to someone I just couldn't get along with and ended up living with her (ESTJ that had no idea about my needs). I was pretty much depressed for most of my younger years (13-18), and stressed a good bit of that time too. So...
I think I might have been through tertiary temptation and developed Ni over Se. I have been noticing the Se coming around in me as I get happier and more content with life. My Te has also been coming around.
I might have had Ne nurtured into me, because every friend I have uses Ne except for an INFJ.