My impression is that your posts get voted up as much as anybody's. Just look at the Karma score list. Look at the "Recent Posts": 3, 4, 2, 22, 3, 5, 7, 18, 0, 25. You have the 22.

You might keep in mind the "Do I want my time back?" criterion that someone posted recently. Your posts are very long. Shorter posts will get more up-votes from people using that criterion.

Also, although I fear you will abuse this viewpoint, I think that everyone has their own "IQ window", and they will down-vote posts that are either below or above their window.