I started T at age 40, but in my experience:
1. My appetite increased gradually over the first year on T, and it was not so much that I was overwhelmingly hungry and needed to eat all of the time, but more like I needed or craved certain foods to satisfy my hunger that were different than in my past. I started to eat more meat than I ever had in my life, and far more protein in general. I would say that now, 4 years on T, whatever that change was is fairly insignificant or just seems normal now. I find it easy to maintain a healthy relationship with food, even though in my past life I struggled with an eating disorder.
2. I only have experience with injections, but one might surmise that any given level of Testosterone may yield the same results, without regard to method of delivery.
3. My hands have gotten a little thicker, something for which I am grateful, but they still seem rather feminine to me. My feet did grow. Well, I should say that I wear a full shoe size larger than I did 5 years ago. Not sure how they actually increased (length or girth), but my old shoes were too small for me after about 1 1/2 years on T.
4. I think in the beginning it is easy to blame the testosterone for any little thing you might be feeling, but it can cause some disruptions in your body's homeostasis. As my vocal cords thickened, I felt like I was getting a cold, or sore throat that never really progressed. I had a fair number of headaches in the beginning, and also when my levels were somewhat erratic. I have developed high blood pressure and high cholesterol as well as polycythemia, all of which are manageable, and some of which may have occurred just due to my age and genetics. All in all, T has done MARVELOUS things for my well being. I am alive, and calm, and happy.