I prefer the tighter design and pacing of Pikmin 1, where managing your resources against time constraints is actually important and central to the game design... but Pikmin 2 is still phenomenal. The Piklopedia alone is such a fun addition to the game, and the caves are generally enjoyable tests of endurance (some are a bit ridiculous at times though, explosives from the sky are always awful). It's also still impressive to me how the levels are recycled versions of Pikmin 1's yet they manage to still feel fresh and different.