I use the bunching-puddling technique of Leah day but I don't try to emulate her clever little designs. I just stick to SITD followed by simple lengthwise patterns like loose waves with curls on them, or outlining motifs. Anything which doesn't require birthing the quilt over and over again.
I just did a medallion quilt 86" x 86" and it worked great because you sip along each border in the medallion, moving the quilt naturally and you don't get 'lost' in the middle.
Good luck, I know you will make something which will make you proud!