I love the feel/look of natural wood. I have several of the Lantern Moon needles (straight) that I love for many projects. On the other hand, metal is more smooth and slippery. If I'm working with a yarn that is 'grabby' I'll use metal. The Options circulars have very pointy tips, great for cabling or when you need to dig into stitches multiple times (thinking of bobble making).
Bottom line: I'm slowly building up a collection of needles of different materials in each size and I choose the needle based on the project.
BUT....if I were to choose one, I'd probably go with the Options interchangeables as just the best basic set that will do almost anything you want.