Generate a realistic portrait of a guy named Alex. The composition should include his upper body, from the hips up. Alex is an ordinary-looking man in his mid-30s, with short dark hair beginning to show a hint of gray, and hazel eyes. He possesses a friendly, approachable demeanor, with a modest smile that reflects his easygoing nature. He dresses casually in a dark-colored shirt, embodying a sense of comfort in his own skin. The background should be unremarkable, perhaps a neutral wall or a typical outdoor environment, mirroring Alex's everyday life