Mind you, I only joined 2 weeks ago.
The idea is that this place will only continue feeling as welcoming and interactive if we all put some time into fostering a community like that. That means not just faving and running like most of us do on fast-paced social media, but to actually spend a minute or two to leave a comment on people's creations.

Consider that your comments are also promotions for yourself; people will see your avatars, your signatures (if you have any) and might want to check out your userpage based on that and the merrit of your comments themselves.
Unlike on social media where the pieces will eventually get flushed away by newer content and might become inaccessible after a while, what you leave under someone's art here might factually be seen forever.

Please don't just come here to dump your art and then vanish into the night (I mean you can do that if you want to, but I am asking all of us to pls not do that for the following reasons:)
Everyone enjoys a little bit of praise and positive interactions on their works. If you want to continue to receive, consider doing your part in building a community and giving some, too.

A comment as simple as having a single, short, positive thing to say about one particular part of the image you're looking at and enjoying a lot ("nice lienarts" "fantatsic choice of colors!" "Love the character's expression!" etc) can do so much in uplifting the artist's spirit and motivate them to continue creating and sharing their works.

I really hope we can foster some positive, interactive community here.
But we all got to pitch in a little to make it work!