Digimon World 2 was always my favorite of the classic Digimon games. Simple as that.
I always loved turn-based RPG. This and of course monster-catching were the main aspects that got me into Pokémon back in the day when it launched. But it was "trapped" in a tiny Gameboy screen only. Ok, we had Pokémon Stadium but it was only battles without the catching part so something was missing... and then came Digimon World 2, with a whole lot of exploration to do, a bunch of mons to catch and with my beloved turn-based battle system in it. It rocked my world back then!
You see, I'm a 90s kid, Pokémon and Digimon were franchises that were never rivals to me, but brothers that went on slightly different paths and coexisted pacifically in my heart.