Milk chocolate tastes better to me. When I was younger I honestly thought they would taste the same, but something about them makes one taste different from the other.
White Chocolate isn't even chocolate at all it's like milk solids with sweetner, and most milk chocolate isn't even chocolate either, like it'll have a gram of cocoa and like all milk and wax. But honestly I like them both. My favorite milk chocolate is the really cheap holiday kinds that come in the foils... MMM. But my favorite chocolate has to be real dark chocolate, like with 70% cocoa or so, it's so good. I ws introduced at a young age to the yummy bars with the other flavors mixed in like sea salt or wine, because we used to be hoity-toity family when my mom had a rich boyfriend. Ever since I've been hooked. =]