offbeat
Pleasantly strange or different from what people usually expect.
Offbeat describes something pleasantly unusual or quirky, something that doesn't follow the expected pattern. An offbeat sense of humor makes people laugh in unexpected ways, with surprising observations rather than typical jokes. An offbeat movie might tell its story in an unconventional way, or focus on unusual characters that bigger Hollywood studios might overlook.
In music, the beat is the regular rhythm you tap your foot to. In a typical song, certain beats get emphasized: ONE-two-THREE-four. The offbeats are the quieter, in-between moments. When musicians emphasize these unexpected beats, the music feels fresh and surprising.
When you call something offbeat, you're usually paying it a compliment. An offbeat solution to a problem means someone thought creatively instead of doing the obvious thing. An offbeat store in your town might sell unusual items you can't find anywhere else. There's something appealing about offbeat things: they show that someone chose to be different, to zig when everyone else zagged.