Vary your wire gauges. TemCo on Amazon has 100ft spools for cheap. Get kanthal and Nichrome 80 (N80) to see what you like to build with better. Nichrome is a little bit more flexible and easier to manipulate and has a faster ramp up time, but also comes in at a lower resistance per gauge. I'd say get some 24g, 26g, 28g, & maybe some 30g Kanthal/N80 to start out with.