i love all of them! i must say though for some reason im not a big fan of the v.2. i havent gotten a music start yet(i might this weekend!) and i dont own a v.4.5. i only have a v.5 running its really fun!
but i have to say...
everytime i play with my very first tama. the v.1 its so fun
it brings back so many memories and i love how simple it is.
i also love the v.4 because i love the game where you have to catch the music notes.
the one thing i dont like about v.5 is not being able to give your tamas a first name. but its still fun!