It's well-known throughout Star Trek TNG that Data has a positronic neural network. Were there ever any specific advantages presented as to the usage of positrons vs electrons or photons for this technology? Did Dr. Soong just have a thing for antimatter, or was there a well-described reason for Data's head to be filled with subatomic antiparticles? Maybe so he could self-destruct it in an emergency! :)
I suppose the out-of-universe explanation is that the writers just thought positronic sounded futuristic. Is that also the case?