I'd left a detailed critique on another artist's picture, commenting on what she'd done well and what could have been done better, and suggesting some photoshop techniques that would help her achieve the effects she seemed to be going for.
Shortly afterward, I was contacted by the admin of Project Comment: a group on DeviantArt that was founded for the purpose of helping artists to get more comments, especially constructive and well-thought-out ones.
She said she'd noticed that I was interested in helping other artists to improve, and invited me to participate in Project Comment.
I was happy to accept the invitation, and after leaving constructive, detailed comments on several other members' pictures, I submitted a couple of my own to be featured in the group.
Sure enough, the comments started coming in, and several people added me to their DeviantWatch.
Now, don't get me wrong - I draw because I love drawing, not just for the attention - but it's so much better when people can see and enjoy my artwork. ^_^
A few days ago, I got another piece of good news: I was being featured in their June-July Features of Great Commenters piece, and I could have one of my pictures displayed in the feature.
I chose my post-Pacifist Undertale wallpaper, and now it's on their features page, second from the bottom.
If you want to get more well-thought-out comments on your artwork, and you're interested in helping other artists to improve their skills, I invite you to check out the group, and to join it if it looks like something you'll enjoy.