Out of the trilogy, I'd have to say Jak 3 was my favorite, though I'm in love with all of the games (including both spinoffs). I very much liked the change from find-and-collect to the more GTA format between the first and second game, though I still find J&D: The Precursor Legacy to be very relaxing and enjoyable to play. As for the spinoffs, I prefer Daxter to Jak X, though both are good. Do you have your PlayStation hooked up for Online? If so, we could race. I'm Jak_Dax_Luver12 or DeathDealer881.
As for where you're stuck in Jak II: You're in the room filled with Dark Eco and the moving polls, correct? Here's some tips. Every time you hear the loud click, it means the spikes are coming up, and you should double-jump to the next poll. When you get to the last poll, I suggest the rolling jump to reach the ledge. Also, if you fall, quickly take out your jetboard. Instead of dying in the dark eco, you can just ride back over to the door and start going up the pillars again. As for the rest of the room, it's just basic platforming. If you want me to, I could probably do a video capture of the room you're stuck in to show you how to do it, since I can't remember the exact order of the obstacles right now...
And I sincerely hope you recognize the quote from my signature, Jak and Daxter fan.