Well, speaking for myself rather than Bullet123 or MaryBeWaiting etc, I'd say you're right, Lingle. It takes me absolutely ages to build up any sort of data on individuals.
Think of it this way. Suppose you have a whole brain 'filing cabinet' full of info on people. If you open the drawers, you can take out the file for Fred and look through it and find out what Fred likes and doesn't like, what Fred normally sounds like and looks like, what you last said or did with Fred etc. You can also open up the files for Sid, Harriet, Jenny, Zak, Jas, etc and look at all of them, think about how they get on together, who said what about who, etc. Yes?
Open the same drawer in my mind, and there's a big jumble of almost blank pages in there, some with the word 'Fred' written somewhere on it, but no real clue what Fred looks like, acts like or otherwise. If I want info on Fred, I have to spend about half an hour searching through every sheet and putting it together to give me some clues. Then the minute it's back in the drawer again, it unfiles itself back into a mess. Forget any ideas about me being able to look at more than one person at once. My brain just can't work that fast.
Not so for pictures of things or places or animals. I can find info on them very fast indeed. Something's wrong with the filing system for people.
It's why if someone's angry with me, it can be such a big deal. I can't find the info on them to work out why, and even if I can, I can't find any info about other people at the same time. So they're the total focus of my brain and it's like 100% of the world is angry with me all at once. I can't think, "Oh but Sid isn't angry, and neither is Carol", because my brain can't load their info at that time. I need people to help me 're-load' the right info to get me to calm down, once I've had some space to think.
Gossip? I quite enjoy it, but 'who it's about' is fairly irrelevant to me. I'm just fascinated at what people do or don't do. It's nothing to do with me strengthening relationships (no clue how to do that) - it's pure information-exchange.