[Infrared]

My two best friends are IxTJ, and ESTP.

[koalaroo]

My best friend is probably an ISTP (we think about things the same way although we perceive the world in a completely different way). My other close friend is probably ENFJ or INFJ.

[Richard]

All of my friends have drifted out of my life over time, I don’t have any left.

Generally speaking, I probably have the least trouble with XNXPs.

[CowboyBarry]

Out of the people I actually keep in contact with:

I suspect that my two oldest friends (since I was in 2nd grade) are an ESTP and an ESTJ. They're two of the only sensors I've ever REALLY enjoyed the company of.

Two friends from middle school are an INTJ (confirmed) and an ENFJ (suspected).

A friend from high school who I rarely see in person these days but still keep in regular contact with is an INTP (not confirmed, but I'm pretty much positive). It scares me how similarly our minds operate, especially since we are both ideasthetes. It's great to be able to actually communicate with someone without having to translate or dilute my abstract thoughts.

A good friend from work is an INTJ (confirmed).

A good friend from another board is almost certainly an INFP.

One of the few real friends I've made over the course of the last couple years is an ENFP (suspected). He should be taking the test sometime soon.

[Haldir]

My best friends are an INFP and an ENTJ. The ENTJ came about in a strange way. He's basically used to bullshitting and manipulating and even outright bossing people around to get his way. I saw straight through his BS and called him on it. Instead of getting defensive or angry, he actually liked it. We've been best friends ever since...and he doesn't bother trying that crap on me ;)

[KINGJADEX]

My two best friends are INTJ and ISTP.

[voronoi goggles]

Infj, enfp, Entj, Entp,

[Brainfreeze_237]

Two INTJs, one suspected INTP (though I've actually met several), one ISTP, one ENTJ (borderline P), another EXTJ, one EXTP, two or three ENTPs, and just one INFP.

Love the INTJs, the ENTJ is my longest-lasting good relationship to date, although it took a while to get used to each other; no idea what I'd do without her these days.
The ISTP is fun, but sometimes annoying. Lightens up the mood, expert troll, but... ehhh. No significant problems so far though.
The ENTPs know how to make my day, but they're mostly incapable of listening: too hyper, too ADD, but it would be so boring without them.
The EXTJ and EXTP are both girls, and I suspect it's the cold logic that connects us. Also, I have a hunch they're moving towards N lately, but I could be wrong.
Fascinated and frustrated by the INFP. I consider him my moral compass, but his stubbornness and at times passive-aggressive behavior piss me off like nothing else can.
Smooth sailing with the suspected INTP, but while we're good friends, we're not as close as one would expect two INTPs to be. I've clicked more with other INTPs I've met, but they've all eventually floated away.

[Neurasthenia]

A selection of my closest friends: INFP, ISTP, INFP, INTP, INTJ, INFJ, INTJ

[Doctor von Science]

INTJ, ENTP, and ISTP. So much Ti...