TheDyingMessiah
I've only played the first one, though I didn't really enjoy it too much.
Most games, including this one, in the first of their trilogy series aren't usually the best. I agree with you that the first Jak game wasn't the best, but the game immeadiately got a hell lot better when you heard Jak's first words in Jak 2:
"I going to kill Baron Praxis!"
Everyone who played that game was like "holy s**t", he speaks. From there, the games just took off.