1. I like both, and drink red or white, depending on my mood and what type of food I am having with it.
2. Yes, most airline and casino wines are an inferior grade......just above swill.
3. Most reds are served at room temp, but really should be slightly chilled ( I put the bottle in the refrigerator for about ten minutes. If I am having something full bodied like a cabernet sauvignon, I will used a decanter to allow the wine to "breathe".....being exposed to the air for a while will bring out the aroma and flavor ofthe wine.
4. Yes, I believe that some of the compounds found in some red wines do provide some benefits to overall health.
Try some of the lighter tasting white wines. Chateau St Michelle or Hogue Late Harvest Reisling are two wines that are slightly tart and a little sweet. You should be able to buy a bottle of either wine for around $10. Sauvignon Blanc is another type of white wine; Cloudy Bay from New Zealand is very nice and should run you under $30. If you want a red wine, may I suggest a Pinot Noir such as Cambria Julia's Vineyard for under $25 a bottle.
Many charities have benefits that feature wine tastings. This is a good way to sample many different kinds of wine. Take a small sip, roll it around in your mouth, spit it out, rinse your mouth with a little water and then move on to the next sampling. You should be able to run into a wine that suits your tastebuds.
Side note: Don't be put off if the wine has a screw cap instead of a cork. Many winemakers , especially from Australia are using screw caps to seal their bottles. It has nothing to do with the quality of the wine. As far as price goes, you should be able to find some very drinkable wines for under $20. Good luck.
Glasses can affect your vision; especially when they have been emptied several times.........