This is an enriched dough. It is a lot softer than your typical bread dough. When the dough is finished kneading, it should be tacky to the touch, but not overly sticky. If it is too sticky to handle, it might be that it needs more time to knead or the humidity is effecting the dough. If the dough feels greasy or oily, the butter might have been too soft when you added it. A few minutes in the refrigerator should help solve this problem.