What makes you decide to reply or ignore a message

Username, picture, and what the message says.

How I'm feeling and what it says

Who sending, what it says

The content. Some guys write as if I'm some kind of instant sexting machine or send pics of their junk.

I usually ignore it unless I've know a bit about the person and/or have had dealings with them on public posts

Do I know this person? If yes, do I like this person? If yes, do I want to talk to this person?

I always reply. Even if I don't want to talk to someone (i.e. under age), I'll let them know.

Nothing really as I try to reply to everyone.

Content of the message

I reply to everything