In roughly chronological order

Old school hardcore & jungle
Chemical Brothers, Prodidgy
Sasha & Digweed
BT, Rennie Pilgrim & nu-school breaks
The End & Bedrock @ Heaven
Carl Cox, Darren Emerson
Sonar Festival, free parties

Seminal techno moment was first time I saw Jeff Mills at Lost in the East India Docks warehouse. Man that was good...