When crafting a witbier, avoid overdoing any one aspect of it. Don’t go crazy with the spices. Keep the hopping level restrained. Don’t let fermentation temperatures rise too high. Don’t sour the beer excessively. Your beer should be flavorful, but all the flavors should be balanced.
Jamil Zainasheff states "The characteristic fruity/spicy flavors and aromas of this style come from fermentation, although some brewers do add spices. While some brewers may add spices, I prefer the more subtle and complex spiciness that fermentation develops."