Here's my list of moments
Best Area: Ashenvale and Dun Morogh (both for the same reasons - graphically/aurally gorgeous and ooze atmosphere)
Worst Area: Desolace (too plain and bored the shit out of me questing there. Felt like a grind)
Best Instance: Not sure I have one although I have fond memories of WC and SFK
Worst Instance: RFK and RFD - both identically bland and shitty
Best Drop: In terms of stats, the boots my rogue is wearing. Most stuff I get from the AH though.
Best Q: Nayon's Warlock one when we decided to trek through enemy territory from Gnomeregen.
Worst Q: Most of 'em in Desolace.
Toughest class come across: Warriors - Do lots of damage along with have a shitload of armour to cut through.
Easiest class come across: Soft and squishy cloth/leather wearing classes - can take most of them down in seconds before they get a single attack off. Mail classes go down pretty quick too, especially 40+ Hunters.
Best Bat ride: Stormwind - Ironforge (Alliance bat ride, not the tram - from when I had an Ally hunter)
Funniest moment: Stealthing and watching a 20 something Alliance having an epic battle with a spider, just winning by the skin of his teeth then him sitting down to eat/heal only to be knifed in the back by his hidden audience after all that hard work. Oh how I laughed.
Monitor through the Window Moment: Loads. Alterac Valley when it's full of idiots springs to mind. Selfish words removed in instances who **** off after their tasks are complete. Players who spit their dummy out when they can't get their own way.
Best Moment: Being jumped by a 49 rogue (when I was 47) while mining in Tanaris only to come back from the dead minutes later and totally humiliate said 49 rogue by killing it without so much as a scratch.