Which LMS do you use and why?

I just saw this thread in the popular conversations, so I thought I'd chime in as well.  Apologies in advance for duplicating any information in the last 8 pages of posts!  (Everyone in these forums is awesome!) 

We started with the Articulate Online solution as we primarily just served one specific audience (external customers), without the need for additional features and reporting.  Now we are currently using Mindflash for our training content to serve multiple learners (clients/customers, partners, and internal employees).

This solution includes the features and delivery mechanism we were looking for and quickly with the right price point.  It was heavily driven by the type of content we were looking to provide to each audience.  This helps us upload a lot of content fast, in a variety of ways (ppt, video, SCORM from Storyline or Captivate, pdf, even YouTube). 

I really think the LMS decision depends on what you are looking to get out of your "tool" or system.  There are quite a few options out there, and I even think your needs may change over time, or vary depending on the size of your company.