My first Tama was Tamagotchi Angel and I got it for my birthday when I was 6. Sadly, I lost it and haven't found it in 11 YEARS. I still miss it, I had the secret character too. ;_;
I always liked my v3 the most because I like the design on mine... and I actually like the 9999 point limit, and the games. I never had v5 and up though so I don't know what the rest are like.