Although there is some overlap, I've divided the traits into Older (1980-1993) and Newer (1998-current) incarnations for your convenience. :D
Older: --unpredictable mix of songs from back catalogue --no Joy Division songs --Gillian --few prior announcements of songs --no backing tapes --younger audiences --lots of off-key singing and bum notes --live versions of songs not yet recorded --drugs, drugs, booze, drugs --Steve's traditional acoustic drums --Barney's frenzied one-chord strumming --more frequent touring --more youthful contempt for audience --relatively static stage presence
Newer: --greatest hits sets (mostly) --Joy Division songs aplenty --no Gillian --most songs announced --backing tapes --older audiences --not as off-key singing --live versions of songs already released --some booze, no drugs --Steve's new electronic drums --Phil's guitar wankery --more rare touring --more fun while performing --Barney's "dancing" and all those whoops and come ons