Definitely for me would be his old late-90's Friday night show's. This was when I started listening to Jules. A great period of music between 1998-2002 in my opinion.
My favourite ever Jules Friday night show was 05-11-1999, I still listen to this regularly on my ipod, Such a classic 30 minute mix to end that show.
30-Minute Mix - 05-11-1999
18. Singles & Angles - 'Submerge' [Liquid]
19. Unknown - 'Powersurge' [white label]
20. Fridge - 'Angel' [Orbit]
21. Conductor & The Cowboy - 'Feeling This Way' [serious]
22. Beyond - 'Still Dream' [Conception Artist Management]
23. Digger - 'Episode 1 (Church Of RA)' [Casa Nostra]
I would seriously recommend those who havent to check out this show. Other classics featured on this particular show included: GD - Choral Reef, Space Brothers - Shine 2000, and Perfect Phase - Horny Horns (Joe Fandango Remix.