I think the locals may have gone to every event in there respective Parks - WDW vs. DL.
Unless you are indepently wealthy, I don't know if one can attend each and every one.
I've gone to the NYC Mary Poppins event, Magic & Merriment (purely by luck, I was still there!), 1st Anniversary party (very last minute trip to attend). I was thinking of Flowers & Fireworks, but it didn't seem very interesting.
Does the D23 staff count? I'm sure there's got to be at least one D23 cast member that's gone to all of the events haha.
As for a D23 member, I am doubtful that there's somebody that's gone to all of them. I've gone to a good bunch:
Up all night
Disneyland 54th Anniversary Event
D23 Espn Zone Meet
1st Anniversary DL Party
I think that's it (and also the upcoming Swiss Family Robinsons event since I've already bought my tickets for that)...
I've been lucky to have been able to attend:
Candlelight Spectacular '09
Magic and Merriment '09
D23 Anniversary in WDW
D23 Anniversary in DL
Studio Tour '10
and next week I will be at the Archives 40th Anniversary Event
Jaxum- Disneyland Aficionado!
Disneyland, WDW, and DLPR Annual Passholder
D23 1st Day Charter Member My Disneyland and WDW videos and photos! http://youtube.com/tkfore21 .... http://www.flickr.com/photos/jaxum_readis/sets/ Disney days for 2009: Disneyland:(27) / Tokyo Parks:(4) / WDW:(19) Total Days in the parks for 2009:50! Disney days for 2010: Disneyland: (27) / WDW:(31) / DLRP: (6) Total Days so far in the parks for 2010:63! D23 and Other events: Expo '09, Candlelight Spectacular '09, Magic and Merriment '09, D23 Anniversary DL/WDW, Studio Tour April '10, Disney Archives 40th Anniversary, Destination D: Disneyland 55, Disneyland Scavenger Hunt, Sip and Stroll '10, Tangled Screening, TRON Pop-up Shop, Magic & Merriment '10, Everest Challenge '09, Adventurer's Club Weekend '09, DL Candlelight '09, Gumball Rally '10, WDW Radio 24 Hour Live Show '10, Disneyland's 55th Anniversary, Pacific Northwest Mouse Meet '10, Mickey's Halloween 5k '10,WDW Radio Walkabout '10, ConGaloosh '10, DL Candlelight '10