I started out with metal needles and didn't like them. Then I went to Clover bamboo needles. They're nice and more reasonable in price than Addi and some of those name brands. I now have Knitpicks Harmony Wood interchangeable circular needles that I just adore. I've had them for over two years now and the lacquered coating makes them slick as a dream. The only thing I'm sorry about is that I didn't get them sooner. It's all your personal preference. Try a few out at a local yarn shop and see what you think.
I've always liked wood or bamboo for knitting needles. For crochet hooks, it's different. I put my Boye metal hooks away. My new favorite is colorful acrylic hooks by Coats and Clark/Red Heart Crystallites. I like the colors and they're lightweight. Such an extreme in tastes between wood and acrylic!