Fun fact: Porcupine Tree actually opened up for Ozric Tentacles, on a few occasions. Just saw OT live last week, they were great.
Ozric Tentacles album recommendations:
Erpland (1990) - If you like organic sounding spacerock, with lots of world music and eastern influences. This one is a flagship OT album (they have like.. 20 records), and it features the fan favorites 'Eternal Wheel', 'Tidal Convergence', 'Erpland' and 'The Throbbe'. These are essential OT tracks. On the downside, the production of this album isn't that great, but it's not hindering the music in any way.
Curious Corn (1996) - Good sounding production, and more electronica. Combination of sequenced tracks and band tracks. Most psychedelic tracks are definately 'Oolite Grove', 'Oddentity', and 'Papyrus'.
Waterfall Cities (1999) - This one probably has Ozric's most progressive tune to date: 'Coily'. This track is amazing, you should hear it.
Then there's a great compilation album called '
Eternal Wheel: Best of Ozric Tentacles'. I know all their material, and I think this is a great selection to get to know the band. It opens with 'Jurassic Shift' (from the record of the same name), and that's also a flagship Ozric tune.
At the end of the day, it's all Ozric Tentacles, and it's all just insanely spacy and fun to listen to. But these are my favorites. No matter what you check it, please avoid anything they released after 'The Hidden Step' (2000). After that record the band actually stopped being a real band with contributing members, and essentially became an Ed Wynne solo project, with uninspiring sequenced tracks that don't go anywhere.
www.ozrics.com - they have some tracks up for streaming.