Have you ever tried stitching with cotton thread on cotton fabric? I love the way it “melds” into the 100% cotton shirting fabric I use for men’s dress shirts, and since the Italian-made Aurofil I use is a finer weight, it also makes lovely buttonholes. Use it the next time you are make a high-quality cotton garment, and let me know what you think.
Happy sewing!
Maris