Quilting serves two purposes. One is to hold the layers together. The type of batting you use will dictate how closely the quilting needs to be to each other. Heed this guideline. My brother-in-law was gifted a quilt. The person who made the quilt didn't quilt it closely enough together and when he washed the quilt the quilt bat moved and bunched making the quilt unusable. I had the big job of taking it all apart and putting in a new bat and quilting it correctly. He wanted to preserve the quilt because the fabric used was from his children's clothes when they were little.
The second reason you quilt is to add design. How you design the stitching to show or not to show is up to you. Some people like very densely ornate quilting, some like straight lines, some like it not to show. The choice is yours as long as you follow the rule above about quilting it closely enough so it doesn't fall apart.