I hardly see you on the shoutbox. But I know a lot of members new and old greet anyone. Persistence is the key to being recognised. And I know many senior members would agree because we were much the same as yourself back in the old days. But had saying that it's not that people don't like you so they don't greet or farewell members, it's because most of the time their eyes slip over the shout, or that they're busy with someone else and don't pay any attention to it, which sounds harsh, but it isn't intentional.
Though, I'll leave you a quote which makes a point to your last comment,.
"Respect is like a paycheck, it has to be earned."