Some of my favourites in no particular order:
Super Mario Bros. 3
Super Mario Galaxy 2
Legend of Zelda: Spirit Tracks
Legend of Zelda: Ocarina of Time/Twilight Princess (they jockey for second-favourite Zelda)
Prince of Persia (2008)
Beyond Good and Evil
Pokémon Trading Card Game (I have a weird obsession for digital TCGs sometimes)
Metroid Prime Trilogy
Telltale's adventure games (all of them)
Sierra's Quest series (Police, King's, for Glory, I love them all)
It's hard to limit myself to just 10 (and the compilations above are probably cheating)... I probably should have more of the adventure genre in there, which is probably my all-time favourite (as long as 'Nintendo' doesn't count as a genre), but I wanted to round things out a bit.
Edit: I should probably throw out a few honourable mentions that all could have easily made the list but they slipped my mind at the time. While writing this I realised I pretty much had another 10, so:
Shadow of the Colossus
Chrono Trigger
the Paper Marios
Ōkami
Pikmin 2
the Kororinpas
the Ace Attorneys
the Professor Laytons
Rayman 2
Mega Man X
Super Mario Bros. 3
Super Mario Galaxy 2
Legend of Zelda: Spirit Tracks
Legend of Zelda: Ocarina of Time/Twilight Princess (they jockey for second-favourite Zelda)
Prince of Persia (2008)
Beyond Good and Evil
Pokémon Trading Card Game (I have a weird obsession for digital TCGs sometimes)
Metroid Prime Trilogy
Telltale's adventure games (all of them)
Sierra's Quest series (Police, King's, for Glory, I love them all)
It's hard to limit myself to just 10 (and the compilations above are probably cheating)... I probably should have more of the adventure genre in there, which is probably my all-time favourite (as long as 'Nintendo' doesn't count as a genre), but I wanted to round things out a bit.
Edit: I should probably throw out a few honourable mentions that all could have easily made the list but they slipped my mind at the time. While writing this I realised I pretty much had another 10, so:
Shadow of the Colossus
Chrono Trigger
the Paper Marios
Ōkami
Pikmin 2
the Kororinpas
the Ace Attorneys
the Professor Laytons
Rayman 2
Mega Man X