I have only 2 Tamas, Version 4.5 and Music star. I can't get more because my parents don't let me buy anything from other countries from online, and there aren't nowadays any Tamagotchis in real life stores in Finland.
My V4.5 is now an oldie, Ojitchi. Currently 12 years old. I'm trying my own age record :'D 1st generation.
In Music star I have Makiko. 2nd generation.
Both are 1st gen, because I got new batteries for my tamas a week ago, and I started new generations.
V 4.5: URA-Togetchi
Music star: Mametchi
I'm so happy that I got Mametchi on my music star :)
I got my first tama when I was 8 or 9 years old. I went to shop in some Saturday with my family and I had some my own money with me. I wansn't so sure what to buy, so I just bought something that seemed cool. I saw a Tamagotchi version 4.5 and bought that, and that was a great choice ;)