This video is part of our "Motley Fool Conversations" series, in which health-care editor/analyst David Williamson discusses topics around the investing world.

In this edition of the Fool's popular "1 Dividend To Buy, 1 Dividend To Sell" series, David looks at two of the market's most interesting dividend stocks -- one whose prospects he likes and one he thinks investors should avoid. Today, David discusses the potential catalysts and pitfalls for Exxon Mobil and AstraZeneca and declares one of the Big Oil and Big Pharma heavyweights a winner and the other a stock to avoid.

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