Too many posts to read to see if mine are already posted but:
Eastern Airlines ride (where the Buzz Lightyear ride is now)
River Country
SkyWay ride
being able to park at the Poly and walking to the TTC
The cream of chicken soup at the second floor restaurant at the Poly.
And what do I miss most of all???
Cast members who act like they really enjoy their job and working for WDW instead of the sloppy, lazy and indifferent cast members they have now.
(Now, before everyone flames me for this I need to say that I was a castmember for 5 years, not every castmember working now is lazy, and yes it is hard to have that Disney magic for minimum wage, but if you're working for the mouse, it's expected of you.)