And I thought I was the only one with ever-changing taste LOL! With regard to technique only (not quilt patterns), my go-to book is always the good 'ol Fons & Porter Complete Guide to Quilting. I have an edition that's as old as the hills, but the general information is still great.
I'm a fan of Eleanor Burns also; for quilt patterns, her books can't be beat. I think Nancy Zieman has done some nice stuff lately as well. But really, there are too many designers that I love to count them all!