Three posts in a row? Semmie, it's called the "modify" button. Use it.
Moved your first post out of the thread, because I blatantly said no more nonsense and yet you share a stupid image of a dog and give another string of excuses.
Again, stop it now.
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Back to talking about Yakuza, not semmie.
Anyway, I'd say 1-3 are well worth playing, since Yakuza has a strong emphasis on story. It's like, the first two Harry Potter books are sort of childish, but they're essential to getting the whole story. Or with Shenmue, Shenmue II is a big improvement but the first is still a must play.
However, Yakuza 1 does have the english dub, so if you can get over that then it's worth playing. Yakuza 2 is awesome.