Played the entire time just filled with gratitude to (finally) be getting more Psychonauts. I have no interest in parsing out what components of my enjoyment came from nostalgia vs. genuine passion for the game at hand, all I know is I loved every second and that these characters are incredibly dear to me. It is fun to run and jump and zap and bop things. The levels are consistently so delightful and surprising and imaginative.
My only frustration with this game (and Psychonauts before it) is that my love for the vibe drives me to exhaustively seek out every character possible between every trigger and flag to see if they have something new to say. This grinds the momentum to a halt more often than is necessarily fun, but the writing frequently rewards the diligence.