Fourtails, those are all different and all gorgeous! I love seeing all the different ways people use the same techniques to make such different beads. I'm a sucker for the more organic type beads and I love the look you got in yours.
Cadia, as far as making different twisty combos, you want to stick with colors that play well with silver. Blues, purples, greens..... experiment. You never know what you might discover.