Fresh or consistent. Something that's changing (so it does not get boring) or something that's about the same time after time. In the context of a presentation, think about it like this.
You have a PPT with 10 bar graphs on 10 slides. Would you:
a. Present all 10 graphs in exactly the same way?
b. Present some bar graphs in a different colour scheme (to ensure it does not get boring)? or
c. Present some bar graphs vertically (the default option) and make some bar graphs go horizontal (right to left). There can be some 3D as well :-)
d. Both b & c
Which one would you choose? Which one do you usually choose?