I create "profiles" for every person (strangers usually, I don't like to personally associate with ppl) that I meet who I notice for any reason, whether they piss me off or they're kind to me. I basically write down and save any information I can find about them and save it. I'm unsure the exact amount of people I have right now. These profiles usually include things like selfies, addresses, numbers, personality details, people they are associated with, workplace, what they drive and their plate #'s, and any random facts about them at all. It's all perfectly legal stuff though. I just enjoy it. When I talk to strangers I like to try and manipulate the conversation to get details from them that I'm personally curious about. I don't use the information for anything, just keep it for myself. You could say it's like doxxing but without actually spreading the info.