Which two types clash the most? Which two types would least likely develop a friendly and healthy friendship/relationship?
In my own experience, I can form a tight friendship with most anyone.
Romantically great, xNTPs, ISTPs. It's a firestorm, and I love it.
I find the ISTJ-ISTP romantic bent sadistic, though ESTJ-ISTP seems really great, as does ISTJ-ISFP. Not a big fan of ENTPs with ISxJs either - I've seen that particular shadow pairing REPEATEDLY and it never ends well. (Sorry, Obie. Not trying to be mean.)
I don't recommend ENFPs and ENFJs romantically either. High octane and crazy misunderstandings at weird moments. I can love my ENFP twin because she's my sister and my friend.
Also, IMO, ENFJs should never ever date other ENxJs. Talk about a disaster waiting to happen.
Which two types get along the best? Which two types would harmonize best in a friendship/relationship?
I think ESFJs and ISFPs make kooky funny pairs. I also like to watch xNFPs take xNTJs down. I know an INFP-INTJ long-married couple and I have a big crush on them.