I never look at booklets for any new games. I still have a PS1 WCW: Nitro booklet, a Driver 1 booklet, and I believe I also have a Battle Tanx booklet. I found it really cool to look through those due to nostalgia and it's also interesting how much booklets have changed over the years.
From lots of info (in some cases, they even had tricks and tips), to literally no booklet. For example, Crash Bandicoot 3 had a cheat code to play a Spyro demo. You just put the code at the main menu, and *poof*, you'd be in spyro land. WCW: Nitro also had a section with a good number of character moves.
Those booklets were cool. Maybe the reason I don't care for booklets anymore is due to this lack of information. There's no reason to check booklets anymore. Anything they say will just be learned in the first 20 minutes of the game.