Coffee: I like the fu-fu coffee so bring on the flavored creamers and sweeteners.
Tea: It depends are we talking about ice tea? If it is ice tea then I like it sweet or I will take sweet with lemon. If it is hot it really depends on the tea. I still would like it sweet but sometimes I will add a bit of milk. If the tea is a very light flavor the milk makes it too bland but adding milk to a stronger flavored tea creates a mild flavor that can be very lovely.