Oak tannins give me migraines, as do other components of red wine. This pretty much limits me to oak-free whites. They also must not be too dry or too sweet.
I'm the only one in the house who drinks wine at all, so I need packaging that allows me to drink one or 2 glasses, then forget about it for a week or more. Most small box wines stay fresh long enough to finish them, and mini bottles work well.