New Super Mario Bros. (console versions especially...I'm apparently alone in liking the DS and 3DS versions more...that being said, the whole series is LAZY)
Mario & Luigi series (Paper Mario 1 & 2 FTW!!!)
Luigi's Mansion series
The Legend of Zelda: A Link to the Past (I've tried and tried...can't get into it...and I'm a HUGE Zelda fan...LOVE the 3D Zelda games and enjoyed The Minish Cap...even liked Spirit Tracks...and I had a blast with A Link Between Worlds...but multiple tries spaced out over years and this game still does nothing for me...)
Pokemon RPGs (Gen 3 thru Gen 5...LOVE Gen 1, like Gen 2, like Gen 6)
Super Mario Galaxy 2
Metroid series as a whole (2D games AND Prime series)
Upcoming Games To Get
Definite: Kirby Star Allies (Switch), Mario Tennis Aces (Switch), Fire Emblem (Switch), Yoshi (Switch), Pokemon (Switch), Kingdom Hearts 3 (PS4), Monster Hunter World (PS4)
Considering: Fe (Switch), Donkey Kong Country Tropical Freeze (Switch), The World Ends With You (Switch), Ys VIII (Switch), Street Fighter V: Arcade Edition (PS4), Kingdom Hearts 2.8 Remix (PS4), The Last Guardian (PS4), Shadow of the Colossus HD (PS4), Anthem (PS4), Shenmue 3 (PS4), WiLD (PS4)
