In my opinion, being buff and/or thin is not the ideal body. The ideal body would be small, and suitable for all climates(ex. gills, sand filters, space-worthy). It would be something like a crab, with two arms that could act as a swiss army knife (ex. hammer, wrench, claw, needle, and a hand). Also, they could shoot your feces at enemies. I would be as silent as possible, and I would have powerful muscles, and thick armor. I would have multiple eyes all over my body, so that I would have no blind spots. This body would also be like a cactus, in that I could go a long time without food or water.