I don't know. I don't really pursue friendships, so all my friends are highly sociable people who make all the social effort. I do practical things for them in return, like decluttering help or fixing their computers. I drop people who hassle me with their drama about nothing, or tell absurd lies, that sort of person. Or rather they drop me? In the face of my utter disinterest they tend to take themselves off. I don't do interpersonal drama.
I'm pretty tolerant otherwise. I have a friend who is completely mad - has repeatedly been sectioned - but it's not the sort of thing that bothers me. She does actually tell lots of mad lies but, hrm, how to say. I just don't get into any situations where that might affect me. I don't engage.
One reason we get on is that I'm very safe for her. I don't really tell people secrets or ask them for favours. I have pretty unbreakable boundaries and can't be swept up in her mania (which can look like enthusiasm and inspiration for a long time). So when she comes down she hasn't firebombed our relationship like she has with other people.
Similarly, I get on with people who like to organise and control social situations, who like to be Queen Bee. I'm very happy to outsource this work to someone who likes it and just turn up. I may actually be a man.
I never call people. I don't have a ringer on my phone and so I never answer it when people call me. I do remember birthdays! I have an app. But otherwise, no. I don't think about people in that way. When they're in front of me, I love them and do my best to be kind and fun, but when they're not I don't miss them. I have two very close friends that I also work with. When I'm not working, I don't think to speak to them. But they are like sisters.
I don't call my sister either. She's aces though. I love her.