PLA
Most popularThe default for a reason: easy to print accurately, sharp detail, the lowest cost, and a wide colour range. The catch is heat — PLA starts to soften around 60°C, so it's not for anything left in a hot car or in direct sun, and it's stiff rather than tough (it can crack under a sharp impact).
Best for: display models, prototypes, figurines, props, cosplay, indoor decor.
Avoid for: hot environments, load-bearing or high-impact parts.