Hmmm I can't remember my first one, but around the time when I DID first get my first tamagotchi, which was a v4, i remember getting a Mimitchi. My friend was like "WOAH, How did you get him! They're like a really good character" and I was clueless on tamagotchis back then, well y'know just like care misses and how to get characters.
But my all time favorite charater has to be ShimaShimatchi <33