The medium of small capacitors is generally selected in the conventional design of ceramic capacitors. The ESR of the NP0 dielectric capacitor is much lower, and it can be used for parts with stricter impedance control, but pay attention to the high Q value of this capacitor, which may cause serious high-frequency ringing, so be careful when using it.
The choice of package, as long as the processing capacity allows, of course, the smaller the better, so that a lower ESL can be obtained, and more wiring space can be reserved. However, different packages have different resonant frequency points of capacitors and different capacitance ranges, which may affect the final number of capacitors.