I have several additions to my bike that I find to be beneficial. The BeadRider keeps my bum dry and cooler in the summer. The HippoHands keep my hand viably warmer when the temperature starts dropping to freezing and below. The bike came with engine guards and I put chaps on them, helps deflect the rain.
I like the idea of feeling the speed when riding without the windscreen on, but I find it is better to keep it on as often as I ride. The passenger back rest is handy with the rack as I use it for carrying something weekly. The two bags are loaded with a first aid kit, tire repair kit, air pump, reflective vest, (in case I ride onto a base that requires it), spare clothes, (I get caught in unexpected rain at times without my rain gear), helmet lock, ball cap, extra sunglasses, water bottle and snacks.
I feel that I have not added anything for looks, but instead because I use the addition.
And like
@D04011, I like the Fat Bob becasue it is a fat tired stripped down ride. For its intended purpose, it works well. If I had that bike, it would stay stock as it wouldn't be my primary communter. Likewise, if I get another VMAX, I may add a windscreen but that is about it.