Thank you for the suggestions.
I think of crazy quilts (perhaps mistakenly) as dark, rich combinations of velvets, satins, and embroidery, which wouldn't suit the muggy South. However, there's nothing that says it couldn't be made of lightweight fabrics. I am, however, reluctant to tackle the random shapes without medication! I'll keep it on the list, though, just in case. I have a lot of dress-shirts that might be just right for a Crazy.
I did some searching of vintage and antique quilts and came up with Log Cabin, too. There are so many variations that one is bound to please. I particularly like the ones that use light and dark to create a 3D effect.
One pattern that appeals to me is Shoofly. It's from the mid-to-late 1800s, I believe, so would be an authentic pattern for an early 20th-century house. I saw a version where the HSTs were square, the pieces between them were rectangular and center block smaller. It had triple sashing and a nine-block where the sashing intersected. I did a little figuring and I'd have to make 120 blocks for the size quilt I want. The sashing would only be 1" wide (cut 1 1/2"). Is that too narrow? Am I asking for trouble? My skills are intermediate but I don't have a lot of quilting experience.
I was hoping to make a quilt that's understated and restful, so a two-color (unbleached muslin and maybe a muted green) was on my mind. Your thoughts?