If you need to portray chunks of information to your readers, a bullet point is an effective way to do it. Sometimes, the usual bullet point appearance doesn’t display what you want to actually say to them that as a result, their eyes get tired of your posts. Bullet points make it easy for readers to read your posts, and draws attention to the eye of scanners. It emphasizes the idea between points and helps to communicate with your readers easily. This is why bullet points are important specially for text-heavy posts.
If you want to get your bulleted lists the way you want it to, here are some tips: http://wpmu.org/how-to-create-custom-bullet-points-in-wordpress/