I prefer simple, minimalist designs. If it were up to me, every kit would only have two colors.
Home: Light Blue and White
Away: Orange and Black/Navy
Keep the home kit simple. Change simple elements every two years. Use different templates like a sash or stripes, or go crazy and do the front of the kit in white with light blue text and back of the kit in light blue with white text.
The away kit can be bold, yet still simple. Black with light blue or orange stripes. Or go all orange with black stripes.
I think what I really want is for Adidas to lose their jersey monopoly. I think they're just bad at it if they stray too far from standard. Nike, for example, is brilliant at being bold and different (e.g. Oregon Ducks).