Types of Links

I'm running a link building campaign and just want to know if I'm missing any type/category of backlinks. There's overlap with some but you get the general idea.

So, what's missing?

Article
Blog Comment
Blog Post
Blogroll
Directory
Document Sharing
Edu / Gov
Forum
Non-Profit / Org.
Press Release
Profile
Reciprocal
RSS Submission
Social Bookmark
Web 2.0
Yahoo Answers