> Is that impersonal? Is it wrong in some way? It's my own very, very private way of keeping people in my life. I don't see it as not genuine or fake.

I agree with you, I do something like this on a much smaller scale to try and keep up with who I have and haven't spoken to recently. I have a lot going on and time seems to slip past me, I can easily go weeks without talking to people and it feel like no time at all. Making a deliberate effort to maintain those relationships doesn't seem like its fake to me.