Wine: Four grapes that will help you kick the cabernet sauvignon habit

I love a great email and received this in my inbox last week: “Please, Bill. Help. I try to try other wines, but no matter what I drink, I always go back to my cabernet (sauvignon), usually from California or Australia, on my next purchase. What other grapes should I try?”
I really appreciate this reader’s desire to break free from his mono-grape dependency. I wrote about the world’s passion for cabernet sauvignon a few years ago, which has pushed this variety to No. 1 in