Master limited partnership investors are in it for the distributions. Consistent, reliable payments backed by solid fundamentals are what retirement portfolio dreams are made of, and it's what MLPs like Enterprise Products Partners (NYSE:EPD), Holly Energy Partners (NYSE:HEP), Sunoco Logistics Partners (NYSE:SXL), and Genesis Energy (NYSE:GEL) are made for.

In this video, Fool.com contributor Aimee Duffy discusses the distribution records of these four MLPs, along with their distribution coverage ratio -- an important metric that indicates whether or not these businesses can cover their payouts. She goes on to explain why it might be difficult for investors to pick just one winner from this excellent group.