Just a quick question for all those seasoned scrapbookers

I'm slowly slowly starting to collect things to get Zander's first album done, but am finding heaps of different things that I love. For example, I have some Suzy's Zoo stickers which are cute, but I also have different branded stickers as well.

Soooo the question is - do you keep the same sort of theme all the way through the book? Oooor do you just stick with one idea per page & allow them all to be totally different colours / sticker themes etc?