I've "discovered" a couple of teriffic knitting "things" recently and I want to spread it around. Feel free to tell me, "Thanks, Jerry; you're the last male knitter on earth to have discovered these."
That possibility notwithstanding . . .
The "Mistake Stitch Rib" (apparently also called Mistake Rib)
This gives a beautiful and unusual sport look -- wider than regular 2 x 2 but still springy. It's also the same on both sides (good for, say, scarfs scarves?)
For 2-color, the intarsia method works, although it'll no longer be quite the same on both sides. Wrap all the color-to-color changes on the same side; you'll see what I mean. Both sides still are attractive.
Any decade now I'll slap on a photo of an off-beat scarf I'm using this knit pattern. On.
You gotta stop whatever you're doing and try a little swatch.