When it comes to cocktails, the old-fashioned is a classic drink that has withstood the test of time. But there is one flavor that doesn't quite mesh well with this beloved drink: fruity flavors.  While it's not necessarily a bad combination, the sweetness of fruits can overpower the subtle flavors of the old-fashioned, which is traditionally made with bourbon, bitters, sugar, and a hint of citrus.  Some bartenders may try to incorporate fruity flavors by adding muddled fruit or fruit-flavored bitters, but the result can be a drink that's too sweet and lacks the complexity that the old-fashioned is known for.  Instead, stick to traditional garnishes like cherry or orange peel to complement the drink's flavors without overpowering them.