The kitchen is a work and social space, it requires the use of Ambient, Task and Accent lighting. Ambient lighting: creates mood and overall light. Task Lighting: is used to perform tasks. Accent Lighting: adds drama and character. When designing your kitchen lighting you need to consider practicality as well as aesthetics.
Sort this out first, the functionality of the kitchen depends on it. Consider your work spaces and light them, stove/oven, chopping bench, sink, inside cupboards.
The ambient light creates general illumination, it casts a overall glow to the room. The colour of the kitchen surfaces will effect the mood that the ambient light creates. Dark and non reflective surfaces will absorb the light and require more intensity. Bright and gloss surfaces will require defused and softer lighting so the space doesn't become stark.
This is the fun bit where you can express your style. The purpose of accent lighting is to create drama and highlight special features. Pick something you love and enjoy your space :)