It's good to intentionally consider mix of really contrasting worlds. The contrast can have an effect of surprise, the variance sparks new ideas, etc. And it's important to also have fun with all of this in the end.

But again, it's good to be intentional about this and not overdo it - I'd say mix of at most 2 styles is a good rule of thumb. One style for everything and one style to complement it to surprise and delight.