Sorry...but your single choice poll doesn't work for my response to your question.
I always have some sauerkraut and kimchi on hand, and when I am making a new batch of either one, I normally just use some juice from an existing ferment. But there are times that I just let it go without adding a starter because the cabbage needs very little help to get going and I only ferment it about 2 days before moving it to the fridge.
When doing a batch of peppers, or sour pickles I will use whey harvested from non fat yogurt.
When fermenting fruits, carrots,beets,bread and butter pickles,garlic etc, I like to use Caldwells vegetable starter.
MissGreenJeans just told me about using Wyeast, because she liked the aggressive ferment she got, but it hasn't finished yet so she hasn't done a taste. test yet.
I plan on giving Wyeast a try at some point.
I have not tried sourdough hooch, although I know of several folks that swear by it.
CM