Four years and 100 episodes later, I'm still going. What a trip. This week, I take a moment to reflect with one of the most surprising and flattering guest hosts I've ever had: my wife, Amanda.

I write this in from pitch black hotel room in Palm Springs. Last night on the plane I made a list of all my guests so far (hopefully I haven't overlooked anyone too serious), and organized them into category. The categories are a bit one dimensional, especially considering that my focus is often on the kinds of people who defy category. How does one place an incredible musician who is also an incredible composer, and a visionary producer? By what name do we call a polymath singer, arranger and multi instrumentalist? What about an actor turned Zen Buddhist priest turned blues musician? Or a bebop piano player who also runs two clubs?

So please forgive me if you disagree with where I've placed your favorite saxophone player or engineer. Overall when I look at this list, I think my taste is generally pretty clear. I've been so fortunate to talk with people who make things I love, some of whom have influenced me, some who I call friends, some who are both.

Moving forward what do I hope for? More. Much more. The rest of 2018 is shaping up to be an eclectic and very exciting batch of new conversations with musicians, writers, producers, and thinkers. And I look forward to continuing to push the edges of the format whenever I can.

But in the spirit of celebration, today is about looking back. Thank you for joining me on this journey.

Singers and songwriters: Nadia Ackerman Jonatha Brooke Alex Cuba Jorge Drexler Duchess Kurt Elling Falu Alan Hampton Jesse Harris Michael Hearst Jascha Hoffman Greg Holden Theo Katzman Jo Lawry Adam Levy Madeleine Peyroux Morgan James Janis Siegel Becca Stevens Sachal Vasandani Pat MAcDonald Noa Leah Siegel Adam Schatz / Landlady

Bass players: Alexis Cuadrado Adam Dorn Matt Geraghty Peter Giron Jeff Hamann Will Lee Billy Peterson Paul Peterson Michael Thurber

Drummers: Louis Cato Liberty Devitto Steve Gadd David Garibaldi Dave King Bill Stewart

Guitarists: Doug Wamble Steve Khan Charlie Hunter Jon Madof Gabriela Quintero

Keyboard Players: Jon Batiste George Colligan Mark Davis Larry Goldings Monte Moir Ricky Peterson

Various: Settling the Underscore - on music in advertising Should I move to Nashville What is music therapy

Arrangers: Jacob Collier Gil Goldstein Rob Mounsey

Producers: Michael Leonhart Tommy LiPuma Matt Pierson Jack Stratton Creed Taylor Butch Vig

Engineers: James Farber Ryan Hewitt Al Schmitt

Music Presenters: Michael Dorf Dave Jemilo George Wein Spike Wilner

Other Instrumentalists: John Ellis Tatum Greenblatt Ryan Keberle Ze Luis Howard Levy Bob Rockwell John Scrapper Sneider Ben Wendel Irv Williams

Entrepreneurs and technologists: Ryan Gruss Peter Koechley Benji Rogers Ralph Simon Gabriel Stulman

Writers, actors, directors, literary people: Peter Coyote Andre DeShields Michael Feldman Laura Garcia Lorca Ari Herstand Clifford Irving Daniel Levitin Ratso Sloman Emma Straub Peter Straub Marc Webb

With Ben Sidran: The election of 2016 The Mobtown Tour Remembering Tommy LiPuma Newport Jazz festival 2015 Welcome to Copenhagen What happened in Paris

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