It depends on the purpose. If it's a quilt for show then quilt as densely as you want. If it's for use I think a less dense pattern is better. My mother and grandmother both tied all their quilts pretty much just enough to keep the batting in place. 2 of the 3 quilts I'm working on right now will be best served by simple SITD quilting for the most part. The 3rd I'm still undecided about.
I do prefer quilts where the quilting and the piecing are in harmony with each other.
It's whatever works best for you.
Rodney