I usually try to get the quilting somewhat consistently spaced over a quilt. If I start it intense, I try to do the whole thing that way or vice versa. There are exceptions to that though, sometimes on a more original or art quilt, I let the spaces suggest their own quilting. If it hangs well, is not uneven and you like it, why does it matter? I am sure there is a judge somewhere that will have something to say but don't listen to the quilt police!