Which LMS do you use and why?

Have used Moodle 9.1 for a few years now. In my opinion, it does a great job to help the student learn the material. Content and assessment material can be built into the same page. This way you can make sure that the student is understanding the presented material on the page before continuing to the next page. If you need to develop scenario or branching type learning activities, then Moodle can easily do this.

I work at Western Michigan University and they use  Desire to Learn 9.4. This system is more of a "pump & dump" type of learning environment; pump the student up with lots of information then assess whether they can dump it out again. I haven't figured out how to easily create scenario or branching activities within the LMS. Not my favorite type of system.

Articulate works great with both of these LMS.

If you are creative enough with your learning activities, then you can use almost any LMS system.