I view the quilting much like when you dress up and need to put accessories on to be totally dressed. Quilting does the same for a quilt. I will do a panto or E2E when either the quilt is going to be a "daily driver" or has a very busy fabric or complex block that would not allow the quilting to really show much.
but I love ruler work and am willing to put the time into it (although customers usually don't want to pay for that) and like modern quilting (what I'm becoming known for with my customers)and that's a slow process. I do try to expand my quilting skills with each quilt--unfortunately what I learned today was to add backing without taking the quilt off the frame !