LA Noire is a very good game and an interesting diversion, but yeah, it's not everybody's cup of tea. I'd suggest getting it if you're into heavy narrative and like a ton of talking sections. The game only really gets heavy on the action in the finale.
Infamous 2 plays the same but missions are a bit more varied. You get the odd mission that's just altered a bit but most of them don't feel like such a chore like they did in the first game.
depends on what you like, LA Noire was amazing for me, I loved the genre and the cars and people etc, would've loved to live in those "innocent" times. Your a classic cop against the world. I would say LA Noire if you liked movies like the Black Dahlia etc