Diffused light (as on an overcast day) is preferable. If you want to highlight masculinity, directly face the camera and have the main light source light one side of your face. You can you a newspaper or white cardboard to bounce some light on to the shaded side of your face, but it should be noticeably darker.
You could either be in the center of the frame, makes you more direct, imposing. To make it less direct and more interesting, mentally divide the frame into 3rds vertically and horizontally, and place yourself on the intersection of a set of lines (rule of thirds, which isn't really a rule).
For backgrounds, either go with something plain (it would focus attention on you, the subject) or an interesting one that says something about it. If your a dynamic, colorful, active person, find something that gives that feeling. If your a pillar of calm thoughtfulness a time elapsed shot is sweet. Go to a busy cafe where people are and sit outside and have the camera take a 1/2 - 1 second exposure. Don't move. You'll be in perfect focus while all the people are blurred in their movement.
1: Know your subject (that would be you)
2: Focus attention on the subject (rule of thirds helps, can also use lines to direct eyes, frame, highlight, or use aperture settings to blur the background)
3: Remove clutter ( if you're the subject, and your neighbor's cat is in the frame, it's clutter, since it doesn't add anything to you ( as your own pet may) and only distracts from the subject)
Follow those three things and you will have a Good picture.
I broke my Nikon when I went camping, now I have to sell my motorcycle to get a new one.