When I am at a loss for quilting motifs I turn to pinterest. There are loads of drunkards paths quilts on pinterest where you can see the actual quilting. IMOH Drunkards path if done in strong contrast colors makes enough of a visual impact you can easily get away with simple straight line all over quilting, like a simple cross hatch or parallel lines with narrow spacing.
I usually don't bother with the "straight quilting for curvy piecing and vice-versa". I happen to be designing the quilting for a quilt right now that is all circles and my motifs are all very curvy and "organic". The quilt's maker told me it will be a gift for a friend of theirs that is a Buddhist teacher and the quilt has many Asian prints fussy cut for the circles so I am choosing motifs that have significance to Buddhism and Asian inspired motifs.
If I was feeling particularly "frisky" on a DP I may quilt motifs of cocktails and bottles or find a panto that had that. Like martini glasses, wine glasses, bottles, corkscrews, ice cubes, etc. But for a non confident quilter working on a domestic machine, you can stick to very simple all over designs or simply echo the curve of the DP. Do look at pinterest, you will get loads of ideas that can get your own creative juices flowing.
https://www.pinterest.com/search/pin...0887&term_meta[]=drunkards%7Cautocomplete%7Cundefined&term_meta[]=path%7Cautocomplete%7Cundefined&term_meta[]=quilt%7Cautocomplete%7Cundefined