What's your favorite game you never hear anybody talk about?
Mine has to be Dragon Quest: Rocket Slime, a DS spin off of the Dragon Quest series that sees you playing as a slime operating a tank and rescuing the people from your town. You run around the overworld, collecting items to use as ammunition and saving money to upgrade your tank. The art and music are just as great as you'd expect from the Dragon Quest series. It made fantastic use of the DS's dual screens. It's also written for a younger audience, so a lot of it is just really silly and fun! Try it out for sure, I'm so sad there's no sequel :(
Phantasy Star Online (PSO). I have thousands of hours in that game across Dreamcast, GameCube and PC over the decades and I'm still not tired of it. It absolutely nailed the loot system and you're always looking to get another rare box drop. BlueBurst on PC still has multiple active and populated servers, but I feel like it doesn't get much discussion in gaming communities in general despite being one of the pioneers of online gaming on consoles.