I teach at my LQS, and am running a once-monthly year-long class for the Spring Bouquet quilt you are making. I showed the women in my class possible stitches, but suggested using the blind hem stitch as it is much less noticeable than the blanket stitch, and less apt to tunnel than the satin stitch. I use stitch length 1.2 and stitch width 1.4, but would encourage you to experiment with different stitches, stitch widths and stitch lengths to see what works best for you. In the end it all depends on what look you want. IMHO, the blanket stitch looks more rustic, or country, the blind hem stitch looks almost invisible, the zig zag shows a bit more, depending upon size, the straight stitch shows quite a bit, I feel, and the satin stitch is thread-dense and may tunnel. I also showed my students how to fuse light weight interfacing to the back of each block to avoid the mess of tear-away stabilizers. We all received the thread as part of the kit, but if you did not, I like Isacord because of the many colors available. If your tension is set correctly there is no need to change bobbin colors; just use a neutral cream, gray, etc. in bobbin weight (I like Superior's Bottom Line or So Fine). Please PM me if you need fabric cutting directions or the packet I put together on appliqué techniques. Good luck...it's a beautiful quilt!