Hands down one of my favourite PS2 games. Everything from the set pieces, to Dr. Nefarious, to the jokes was peak R&C. The series has been on a (mostly) steady decline since.
My favourite of Chief's Halo games. Just across the board improvements over the original, the addition of the Arbiter, and dual-wielding make this a dream to play.
Pretending that Jak 2 doesn't exist, but if it did I would say this is a happy medium in terms of tone between Jak 1 and 2. It's still a lot closer gameplay wise to 2, but I enjoyed the cool powers and somewhat open world.
I think pretty highly of it since it's the way I first played through SM64. Pretty challenging at times really and the camera never helped, but it's hard to deny its impact.