I love that about copic markers, too! There is also a huge downside to them, though, since you'll probably always need a lot of colours to make a drawing. Especially shading can be hard if you don't have all the right colours. I have about 15 of them and before I do any kind of drawing I have to check if I have all the right colours lol! But never underestimate the power of colouring pencils! They're great for shading too, and don't have to be expensive to do the job. I also think pencils are a lot easier to use and are a lot more forgiving (when you make a mistake, you can just erase it).
What kind of materials do you like to use?