My favourite set was probably urza saga, even if I wasn't play when it went off.
But I really loved the Onslaught block: was the set with I really start to pla! goblin, elves, akroma, all with the cards of the judgement block, before of the Negator, my signature card was the phantom nishoba :D
Don't consider me a nood only because I loved big stupid creature, I used to play a totaly different deck.
What deck did you play?
I know, italian and american metagame was different, but...
I played:
t1: WW mono white (for fun); WU-Tang (This is strange, is born on USA, but was played a lot more on italian metagame :O, basicaly a W and U fish with meddling mages, rod, fow, javelliner ecc ecc); Zoo R/G, mono black for fun (the old mono black as I said, with nether void, duress, null rod, then updated with COnfidant,)
Ext: Aggro rock B/G (the one built after kamigawa out, with confidant, troll ascetic, jitte&sword, call of heard...); Vial -Goblin: I hate wizard when them banned Aether vial THE DAY after I bought my last 4 cards: 4 goblin piledriver ._. Wizard you suck... ; Classic Raveger Affinity, with vial first, without mage, confidant, or black splash later.
T2: Mmmm T2 I played alway a little less.. Affinity in mirrodin block, Mono Elves on rawnica block, White Winnie in kamigawa