Nagalski Diageo (NYSE:DEO) has been on my radar for a long time. The name may not be a household name, but the brands definitely are, including some well-established like Guinness, Johnny Walker and Don Julio, and some up-and-comers like Casamigos (known as George Clooney's Tequila) and Aviation Gin (known as Ryan Reynolds' Gin). Somehow I never managed to deep dive into Diageo's financials because I would see its historical Price to Earnings Ratio (P/E) and think that 20 to 25 was too rich - even knowi ...