Posts:
Friending: I tend to add people who look interesting and I'm happy to be added by anyone. I'll usually grant access to people who've granted access to me, though it can depend on the type of posts people make. I'm not particularly fussy about access, a lot of my access-locked posts are just things I don't want floating around for the world to see. If you unfriend me that is completely OK; if I've unfriended you it's probably just because I didn't feel we had a lot in common and/or never interacted with you.
Commenting: I welcome comments, including single word comments or emojis/emoticons. I usually try to reply to comments, but please don't take it personally if I don't! I'm probably just lacking time/spoons.