What are the major rabbinic opinions today concerning the suitability of wine or another beverage for kiddush and other "cups of blessing" (e.g., havdalah, Passover seder's four cups)? Does the wine have to be non-mevushal? Can one use another beverage even if wine is available? If one finds something distasteful, does that disqualify it from use? I know it's preferrable to use wine that has certain characteristics, but how important are they really?

What are the major rabbinic opinions today concerning the suitability of substituting another beverage for wine (or grape juice) for kiddush and other "cups of blessing," e.g., havdalah or Passover seder's four cups? Can one use another beverage even if wine is available? If one finds something distasteful, does that disqualify it from use?