Devon Energy is focused on returning value to shareholders via dividends and share buybacks, but it's still an energy producer.Devon Energy (DVN 0.19%) is an acquired taste -- only appropriate for a certain kind of investor. That's true despite a generous 4.6% dividend yield and a shareholder-friendly dividend and stock buyback policy. Here's why this oil and natural gas company could be a buy or hold for some investors, but many more will likely want to avoid it.Buy Devon EnergyDevon Energy is an upstream ...