Unless you count a couple of brief classroom excursions with Adventure to Atlantis on the Apple IIe (monochrome) back in 1986, my first CRPG was Wizardry on the NES. It was on sale, and I could just barely afford it. Swords and Serpents was also available, but something told me to get Wizardry. I did play Swords and Serpents later, and actually liked it, but I am glad I cut my CRPG teeth on a colorful and sonorous version of Wizardry.
Maybe this is partially why I tend to shy away from most JRPGs, as I feel the first person perspective is more immersive. This led me to my second CRPG, the NES version of Might & Magic, which soon became my favorite classic series.
What was your baptismal CRPG?