- Tag a friend who ...
- Quizzes
- Inspirational quotes of any kind
- Social game results of any kind (or invites for that matter)
In my own feed I had a few culprits who were largely responsible for this noise. I think only in one case did I have to resort to unfollow (although it's an option). It seems that less than 20 sites/pages are responsible for the vast bulk of these. Or perhaps that's just the case out of my friends. I really don't know. Either way after hiding these posts and choosing to see no more posts from whatever the source page was, my news feed is pretty clean.
Others post a lot of BS politics, which I kinda hate. The more ignorant ones (we're talking family here) I've even baited when bored. But I know people who have started using Instagram to avoid the nonsense politics (even though some of these same people like to share inspirational quotes /sigh).
If you're interested in say family photos and updates then Instagram may be a purer experience for you. Assuming who you're interested in posts to Instagram that is.
As for your stuff not getting shared/liked, well that's a whole other thing. Disclaimer: I work for Facebook. Only for a short time thus far but long enough that I've been involved with a bunch of research on groups. A lot of people take groups pretty seriously. One admin I heard speak was talking about how he always made an effort to make people feel included and heard like if someone's post wasn't getting a lot of comments they'd go out of their way to comment on it and include others so that person felt like part of the community.
So I don't know what your interests are but I'm pretty sure at this point there's a group for basically everything. In the right group you may find more sense of community and less of a barrier to posting and sharing because of good admins and just the common interest you have by being in that group.