Drawing manga-style male characters can be a bit more
challenging than drawing female characters because there are
usually more choices you can make. But the basic approach is the
same. You might already know that any anime/manga character is
proportioned by counting the number of "heads tall" they are. In other
words, a chibi character will only be the height of 2 to 3 times the
size of his or her head, and typical "cartoony" manga characters
are usually 5 to 7 heads tall. More realistic (and occasionally
shoujo-style) characters are sometimes up to 8 heads tall. Keeping to
these scales will assure your characters — male or female — look
properly proportioned.
Another difference to be aware of is that female bodies tend to
curve in at the stomach and flare out at the hips, and accentuating
this is a sure giveaway that your character is a female. Males, on the
other hand, have torsos that do not curve in much, and should even
expand out if you're drawing a beefy or overweight character. Pay
attention to the legs too — instead of drawing nice, curvy calves, you
will want to use slightly more blocky shapes to add muscle, or simply
draw the legs much skinnier and straighter (Monkey D. Luffy of
One Piece
is an extreme example). Also, male shoulders tend to be broader (they
expand out farther from the head), and occasionally very muscular
characters will have a neck that sort of expands out into the shoulders
(any
Dragon Ball Z character is a good example).
This brings us to our final point: What kind of male character
are you drawing? In manga, you seldom see female characters that aren't
tall, thin and pretty, but male manga characters can run the gamut from
being short and impish, to fat and ogreish, to tall and striking. Choose
what image you want your character to project and really accentuate the
physical attributes that convey that image. If he's a real geek, make
him hunched over with his shoulders almost behind his head (like L from
Death Note).
If he's a dashing young man, give him an 8-head-tall figure with long,
thin legs and a nice thin torso. The possibilities are endless, but
trying to draw different kinds of figures is the best way to learn
which kinds of bodies create various impressions.