I've done practice pieces on muslin (cut and bound, make great mug rugs!) but I still cannot wrap my head and coordination around stippling! But I did an entire large baby quilt in "bubbles"! It started out looking like a bunch of grapes and I just kept adding a grape to right and a grape to the left. When I ran out of bobbin thread, I took a break and changed "spots" on the quilt. Felt like it took forever, but the result was pretty cool. Once all the grapes merged, then I realized it was a bubbly quilting design! Sometimes, you just have to "go with the flow"!
Best bet, for any of us, relax and enjoy what you, your machine and your fabric come up with! What may start out looking "not so hot" may very well be your proudest moment in quilt design!