http://www.onlineghibli.com/I've seen a few of his films.
I enjoyed each one. ^.^
I've seen Nausicaä, My Neighbor Totoro, Princess Mononoke, Spirited Away, and Howl's Moving Castle.
I want to see Pom Poko next so bad.
Here's a list of what Ghibli has done.
Films
    * Nausicaä of the Valley of the Wind (1984, pre-Ghibli)
    * Laputa: Castle in the Sky (1986)
    * Grave of the Fireflies (1988)
    * My Neighbor Totoro (1988)
    * Kiki's Delivery Service (1989)
    * Only Yesterday (1991)
    * Porco Rosso (1992)
    * The Ocean Waves (1993)
    * Pom Poko (1994)
    * Whisper of the Heart (1995)
    * Princess Mononoke (1997)
    * My Neighbors the Yamadas (1999)
    * Spirited Away (2001)
    * The Cat Returns (2002)
    * Howl's Moving Castle (2004)
    * Tales from Earthsea (2006)
    * Ponyo on a Cliff (2008)   
{Or rather will do}Short films
    * On Your Mark (1995) (a music video created for Chage & Aska)
    * Ghiblies (2000) (TV short film)
    * Ghiblies Episode 2 (2002) (shown in theaters with The Cat Returns)
    * Kusoh no Kikai-tachi no Naka no Hakai no Hatsumei (The Invention of Destruction in the Imaginary Machines) (2002) (Shown at the Ghibli Museum)
    * Koro no Daisanpo (Koro's Big Day Out) (2003) (The first of three short films shown at the Ghibli Museum in 2003)
    * Kujiratori (The Whale Hunt) (2003)
    * Mei to Konekobasu (Mei and the Kittenbus) (2003)
    * Portable Aiport (a music video created for Capsule directed by Yoshiyuki Momose) (2004)
    * Space Station No. 9 (a music video created for Capsule directed by Yoshiyuki Momose) (2004)
    * A Flying City Plan (a music video created for Capsule directed by Yoshiyuki Momose) (2005)
    * Doredore no Uta (a promotional music clip for Meiko Haigou) (2005)
    * Yadosagashi (Looking for a Home) (2005) (The first of three short films shown at the Ghibli Museum in 2006)
    * Hoshi wo Katta Hi (The Day I Cropped/Harvested a Star) (2005)
    * Mizugumo Monmon (Water Spider Monmon) (2005)
    * The Night of Taneyamagahara (2006)
Commercials
    * Sora Iro no Tane (The Sky-Colored Seed) (1992) (TV spot for Nippon TV)
    * Nandarou (1992) (TV commercial for NHK)
    * Hotaru No Haku (1996) (Kinyou Roadshow houeikokuchi spot)
    * Kinyou Roadshow (1996) (Announcement spot for Kinyou Roadshow opening)
    * Umacha (2001) (TV commercials)
    * Shop-One (Online Shopping Mall Announcement Spot)
    * House Shokuhin (House Shokuhin Campaign Commercial)
    * O-uchi de Tabeyou (House Shokuhin Series Commercial, Summer Version)
    * O-uchi de Tabeyou (House Shokuhin Series Commercial, Winter Version)
    * Hajimaru yo, Erai Koccha-hen (KNB YumeDigi PR Spot)
    * Kawaraban-hen (Corporate commercial for Yomiuri Shinbubsha)
    * Dore Dore Hikkoushi-hen (Corporate commercial for Yomiuri Shinbubsha)
    * Risona Ginkou (Corporate commercial)