Here is excerpted my opinions of the quests, other intermediate dialog removed.
Note, however, that *all* of these quests misuse variables and would still require quite a bit of review.
o11c wrote: Easter 2008 is nonintrusive and could easily be readded
Easter 2009 wouldn't be too hard to save
Easter 2010 is my first example of what should probably be deleted or put in the attic (I'm not saying anything about the map)
Easter 2011 involved intrusive changes to other NPCs ...
Halloween 2006 would require a fair bit of work
(there was no Halloween 2007)
Halloween 2008 could be revived with a bit of work
Halloween 2009 would require a search for bugs, but otherwise looks nice and simple
Halloween 2010 doesn't look *too* bad, though I would recommend looking over everything in any case
Christmas 2006 just makes me cringe
Christmas 2007 could be enabled with a bit of work
Christmas 2008 would be pretty easy to reenable
Christmas 2009 would be pretty easy to reenable
Christmas 2010 can't be reenabled because it contradicts the Yeti Quest