I like my quilts to cover the feet, up to the shoulders. Too short of quilts aren't very practical.
However, I do "Quilt As You Go" (QAUG) so it doesn't matter how big I make my quilts. I usually make Queen sizes.
My method of QAUG is done with sashing. I have watch many videos that do it without sashing, but honestly, they look much harder to do. You have to join the batting in each row first, then fold the fabric and join it -- way too much room for error for me, as I am a new quilter at age 72 and don't have time to learn how to quilt an entire one all at one time.
I make my quilts on a home Pfaff sewing machine in a very small space. I have learned to do some free motion quilting on each square before joining with the sash, by lowering the pressure on the foot, but I leave the feed dogs up because when I put them down my quilt is smashed to tightly against the plate and won't move as easily.