I might echo the words of a couple of people above such that it helps to make everything feel the same artistic style. But that style can be in whatever form. Consistency is key! As such, it's important to choose something where the amount of work you'll have to do to accomplish that takes less effort.
From my own experience from playing around with placing textures, people's eyes need to see slight variations; even if their brain doesn't see them.
A couple of ways to do this is to:
Generate a bunch of patterns with the same general look and reference each variation of art asset for each object of that type
Introduce some irregularity to a repeating pattern with sprite masks and/or translucent pixels (that is — colours with alpha-channel values to let you see through them).