In a large bowl, mash together the avocado, jalapeno, onion, cilantro, the juice of 2 limes, salt and pepper. Taste and season additionally if desired. Stir in almost all of the pineapple and bacon, then stir in the goat cheese. Scoop the guac into a bowl to serve and top with the remaining pineapple and bacon for garnish. Serve immediately.