I send thanks for people faving my stuff sometimes and sometimes I write the same thing over and over (like greeting a customer thanking them for coming into the store) and I really hope it isn't too annoying?
I only do this because people have come to my page more often when I remind people more of my gallery is like the art they liked and idk it seems to have really been doin numbers?

But also I know "thanks you come again" can be annoying.

Yes I repeat the same thing generally and when I feel sick I make one message and copy and paste it so I don't have to put too much mental effort in.

I hope that doesn't bother anyone too much? I do my best to make sure I don't spam anyone or send it out more than once per person. I did this once and the person was s u p er pissed and sent me notes about it a bunch and was offended.
If i've ever sent more than one to someone accidentally I hope it hasn't too annoying, I usually tell people by their icon since FA doesn't have a "this person follows you" reminder.