A lot of portraits look good in Black and White and it's worth experimenting with contrast and brightness to get the look of the image you want.
From candid shots, family sittings and events it's worth trying a Monochrome look to see if it works...
The shot below was taken at a Jazz festival and I think giving it the Black and White treatment gives it a more dramatic look and encourages the viewer to focus on the singer rather than the background.
Street photography and architecture can be effective in Black and White, I find more detail is shown up and can give it a gritty look.

These were taken in Birmingham before the Old Library was demolished and some people have said Birmingham looks better in these images.
I don't know about that but I like the way the images look after being transformed into Black and White.
It's nearly summer, get your camera and take pictures.
Karen