I admit I’m not an expert here, but I know that favorite wine you buy at home will not be readily available in Europe. My approach:
• Get a couple bottles at the grocery that “look/read good”.
• Then, find a wine store near your apartment. Ask the owner/agent who meets you at the apartment upon arrival to give you keys, collect any damage deposit, etc. for a recommendation.
• Ask the wine store’s “guy who knows his stock” which bottles match your stated tastes and desired price range. I like to start at 12€.
• Once I find a bottle that is delicious, I mostly stick with it. (Even if I find it in the grocery.)
• Liquor: USA Duty Free is not always a good deal. At the Dallas Ft. Worth airport, a 1.75L bottle of Jack Daniels sells for $50. Jamison, 1L bottle, is $40. In Valencia, Jamison was 18€ for 0.7L. Jack was 16.50€. Other countries/cities may be slightly more expensive but typically equivalent/more convenient when you consider the need to carry Duty Free goods through “TSA-like Inspections” at any European hub city on route to your destination.