I have nonstick cookware, stoneware, glass, cast iron and silicone cookware and bakeware items. My observations are: cast iron gives the best results and the best flavor, it's just a bit heavy. Silicone gives good results, but crusts are not as crispy as I would like, and it's really floppy so you need a sled or cookie sheet to put it on before you use it in the oven. Glass is a little uneven in cooking and baking, not too bad, but a little, plus it can't take the really high heat like for breads. Stoneware is wonderful, it's just harder to clean and little heavy like the cast iron. Nonstick performs well, you just have to worry about the chemicals if you have to cook at high temperatures.
Have a few good pieces, but don't waste your money on big sets of one type. Do your research first, pick out a couple of high quality (not necesarily highest price) items and use them often.