Images are often an overlooked (!) feature when it comes to creating effective linkbait. Images grab attention, and attention is what you want.
However, there is a downside to images. For me, stock images reduce the credibility of pages. So having the right image, rather than just any image, is important. If using images, I'd go with something unique and remarkable.
The irony is I almost didn't link to this article because the images made me think "junk".
http://www.10e20.com/blog/2007/10/24...bait-articles/