1)Golden Sun- It's the first RPG I played ever, it's what got me into RPGs. The story is great, the characters are fun and the battle system makes turnbased combat bearable, and the puzzles require some thought.
2)Devil May Cry- Combat, Characterization and Setting. The combat is what draws everybody into Devil May Cry, the characterization of a white haired joke-cracking, cocky but lovable badass and the setting of a gothic world infested with demons keeps you coming back.
3)Legend of Zelda Twilight Princess- Twilight Princess has the distinguished honor of the first zelda game I beat without a walkthrough, and the first sidekick character I genuinely liked.