I have read numerous posts where we are looking for an easier way of joining two polygons based where the the majority of the one polygons area lies. ESRI needs to add more options in how spatial joins are made when joining vector layers. We are currently delineating crop fields and and need to associate the crop fields to the appropriate parcel boundaries. Crop fields are more accurate than parcel boundaries and therefore the crop fields overlap the parcel boundaries. I clean and simple method that does not require you to export your data to excel is required to join polygons to another polygon based on where the majority of the polygon falls within.