... you're lucky - to discover new music that you like is great at any age. I saw a documentary on PG a few years ago (BBC, I think) which would be well worth checking out. Aside from all his music, he came across as a really funny bloke, lots of friends and a close-knit family.

I went through the same thing when I first saw "Koyaanisqatsi" many years ago. You mean this music has been out here for years and I've never heard it? His soundtrack to "Mishima" is excellent too.

If you're interested in more from Mr Glass, try these
Violin Concerto
The String Quartets
Koyaanisqatsi
even the Heroes/Low symphonies are worth a listen. If you want something else in a similar vein John Adams "Shaker Loops" or "A short ride in a fast machine", are great entry points. Enjoy.

To be encountering the wonders of Philip Glass's music for the first time again would be terrific. His orchestral music, operase, piano music and small-ensemble stuff is all great - I'd particularly recommend the Kronos Quartet's disc of Glass's string quartets. If you like Glass you might enjoy John Adams, too - try his "Short Ride In A Fast Machine" for starters.

As with Curtis above. Saw Mishima at the cinema and was really knocked out by the soundtrack. Ok, it appeared in nearly as many ads as Moby's Play. I'm never without it on long haul flights. Really good.

of seeing the Philip Glass Ensemble in concert a few years ago, and that introduced me to his Dance Pieces. This was particularly wonderful on the night:

I think I discovered Glass via the Penguin Cafe Orchestra. He had an album with guest vocalists (David Byrne, Paul Simon etc) called Songs From Liquid Days released in 1986. Here's my favourite track from the album plus some PCO in case you haven't discovered their work although most people will have through their ubiquitous presence in advertising.

The weird pricing policy on Amazon mp3 albums means you can get Music with Changing Parts for the price of one track - 61 minutes. Another bargain is Music in Twelve Parts, 3h35m for the price of one album.

I prefer his early works - once he stopped being 'minimalist', between Music in Twelve Parts and Einstein on the Beach, the music became less focused, and his later orchestral works are almost too commercial.

But you have hundreds of hours to discover - you lucky person. I've known his work for nearly 30 years and still enjoy it, so it must have something more than superficial note-spinning.

When you've done Glass, you can do Reich (also better in the earlier works) and Riley (start with In C, his most important work - I have 20 recordings, all very different, but the original (Members Of The Creative & Performing Arts At Suny-Buffalo) is just about the best).
If you like a harder edge, try the Dutch minimalists, such as Louis Andriessen - De Staat will blow you away.

Apart from a couple of very early works (eg Common Tones in Simple Time) John Adams was never really a minimalist. He is not to be confused with John Luther Adams, who seems a bit New-Age-y until you listen properly - also well worth investigating.

Enjoy.

... via a quote from Bowie (way, way before the Low & Heroes symphonies!) in an early 80's article in The Face on minimalist music, something like, "Philip's work is the most commercial sound around, a fact only he and I know."

As already mentioned, "Koyaanisqatsi" and "Mishima" are excellent entry points... if you're lucky, you'll be able to get a copy of the re-worked version of "Koyaanisqatsi" that came with an extra compilation CD, "Glass Jukebox", with tracks from a good selection of his albums ("Glass Pieces" is another good compilation if not.) I'd also highly recommend "Powaqqatsi", which isn't quite as focussed as the preceeding "Koyaanisqatsi", but does feature the astonishing "Anthem", one of my absolute favourite pieces of music in any genre (you might recognise it from being used in "The Truman Show".) I'd avoid the operas and dance pieces for a while, but that's just me!

And I second earlier suggestions to check our Steve Reich (especially "Desert Music" and "The Four Sections") and John Adams' "Shaker Loops".