Are wines with screw caps just a sign of a cheaper wine or do they keep wine from spoiling? Is there a difference in food wines versus those you just want to sip alone? I had some Nouveau Beaujolais wine in the past I didn't like but are there some good Beaujolais wines? What are some good but inexpensive (value) wines? I don't care for Sauvignon Blanc wines but my friend loves them. How can our tastes be so different? If I order an expensive wine at a restaurant, do I need to tip on the full price the restaurant charges?