INTP - Close friends and long relationships.
The ones I've known have been so expressive that they're adorable but they're oblivious to my feelings and I end up needing to explain how I feel in more detail than I'm often comfortable explaining. They're also a little scattered and I exhaust them.
INTJ - Friends who like to argue.
It's often entertaining and sometimes educational... but it often feels like this is the only mode of communication available. They are so smart but their feelings get really hurt when they don't live up to their own fragile egos. They don't exhaust intellectually but they don't engage emotionally.
ENTJ, ENFJ - Mentors.
Maybe not best friends but ENTJs are people I admire at least.
I know one ENFJ who seems like he would be a great mentor and career advisor. I'm still working on this
INFP - Commiseraters.
They may be even more mopey than I am and sometimes leave me in the role of optimist. But again my real problem with them is that they're scattered and exhaust easily. I'm quite sure I hurt their feelings, too.
ENFP - Everyone's mom.
The ENFP I know has been a confidant to me. Though I would like for it to be more of a friendship I find that it is often one sided. I tell her all about the little details of my life but have to inquire a lot to get at any of hers. This is the opposite of my experience with most people. She also tends to be a parent to twenty or so people so her time and attention is very divided and I feel she overloads herself.
ISTP - I don't know.
Clueless and dense. I don't know why I keep trying. The S could stand for Superficial or Shallow. They're so smart but understand nothing. Emotional things have to be explained in excruciating detail--enough so that they actually exhaust me. I can't tell where I rank, whether I actually matter to them, and whether they are sincere. They get distracted so easily by itchy clothes, some flickering light, or anything else that they can be frustrating to talk to but despite all this they will actually try to listen. They pretend to agree then state the opposite like some weird passive aggressive form of debate.
INFJ - Fantasy friends.
I don't know that I know any in real life.... except probably my mom and we have other walls. The ones I've met online seem awesome and adorable. They're like cerebral Disney characters--much like how I have felt about INTP friends except that it seems like they actually pick up the emotional stuff in addition to expressing it. In real life they probably turn out to be Hitler or Bin Laden or something.
Stereotypes are just like... types with better imaging, right?