Oh man... My first tamagotchi was a V1 that I got sometime in elementary school. I'm pretty sure his name was Taro (lolz) and I believe evolved into a Masktchi.
I don't remember my first ever character but it was a v3 with an ice cream pattern and my second generation tamagotchi was a young androtchi named Andy. He only got that far before he got killed.
Oh wow this is going back a while. I had a yellow connection v2 named Timmy, I can't recall what his adult form was, all I can remember is that he was a Hotodetchi as a toddler. It upset me so much when it stopped working .
My first ever Tamagotchi was a P1, and since there was no naming option, I never really named it. I just called it 'my Tamagotchi'. When the V1 came out years later, I got a pink one and called her Pochi (can't remember where the name came from, but it was in reference to a cartoon or something).