I found your post while searching for articles about DW/LJ being better than Tumblr. Like you, I enjoy the pics and gifs but I feel Tumblr lacks any real substance and does not allow for any meaningful connections or discourses. Trying to scroll through thousands of notes to see what comments have been made to a post is awful. It's almost impossible to see who is liking a post and who is liking a reblog with a contrary opinion to the original post.
I'm tempted to write meta about this. Would it be okay if I referenced your post if I do?