Photographers that are new to flash photography should seriously consider using bounce flash when possible. This means swiveling the flash head on your camera so that the light source can bounce off a ceiling or wall. By bouncing the flash's light source, you can create a more pleasing visual effect without all the harsh, deep black shadows that direct flash can produce. In addition, because most digital cameras these days shoot excellent images even at ISO 3200, this opens up a world of opportunities for bounce flash that weren't possible back in the days of using film. The photograph above was taken using bounce flash with a Leica R8 and Tri-X 400 film (1998).
The photograph above demonstrates using bounce flash with my Leica MP240. If you use bounce flash, make sure you tape a white card to the flash head to compensate for empty shadows in your subject. Some flashes, like the Leica SF, have built-in white cards that slide in and out of the flash head.