I've only ever had V1s, V2s, and the gameboy game, so I don't have much experience... XD but I'm going to have to say V2 is the best. The characters are a lot more varied than V1, and you don't have to try to get your Tamagotchi's toys every time you get a new one, they're all just there from your last one. Plus, I like being able to send other Tamas presents! XD The gameboy game is a bit stressful for me, because I know they're going to die eventually, and at least on the connections they don't die, they just leave you with a baby...