Illuminations is our favorite fireworks show. Love it.
We have seen it from the front of the park (front row seating that I had to get there an hour and a half before show started in November! Luckily it wasn't too cold!)
But the best place IMHO is from one of the pontoon boats that moor up under the bridge between France and England. Great view, but you also feel the fireworks through the boat. We have done it twice this way. First was Easter 2007 with family from the UK (a special treat for them), but we also got a boat for our 10th wedding anniversary in Jan this year. OK it rained a bit, but still cool. We took champagne on the boat with us and sat under umbrellas. Fun.
Thanksgiving they add a few extra minutes of fireworks. WOW. Amazing. Not sure how long they offer the added show for or if they do it at other times, but they sure do light up the sky then.
-Kay