I have found that straight line quilting tends to change the tension balance relative to the body of the quilt. When I merely ditched the borders, I found I seemed to need more quilting, at some other angle. I am very fond of free motion quilting. I tend to do one of the following:
leaves on wavy stems
hearts or stars on wavy stems.
Whatever you do, practice on paper first (felt tip on old newspaper works). You will find that even a little practice makes it go much more smoothly and evenly. I get lots of comments about what templates I use, but I don't. One of the major quilting guys says he went to a quilt museam and measured antique feather garlands and other patterns. What he found was that many of them were no where near as uniform as they appeared, implying that they were not done with templates of any kind.