For reddit, I let it select them randomly for me. I change accounts every couple years or so. Here I just used whatever felt funny at the time. I'm on my 5th a

For reddit, I let it select them randomly for me. I change accounts every couple years or so. Here I just used whatever felt funny at the time. I'm on my 5th account or so here, long past time to switch to a new one but I'm lazy. For meaningful social networks I just use my real name. For server accounts I use a system of related names per server.