Sounds good to me. Have you played with various distancing/zooming combinations? In other words, standing close to the castle with a wide zoom, as opposed to standing far from the castle with a longer zoom? The castle would fill the same amount of frame, but the size of the fireworks in the background would be different. (In film, this change in foreground/background ratio - while keeping the foreground object the same size - is called a dolly zoom, or "Hitchcock zoom.") I wonder what the "better" position would be with respect to the castle...
Timekeeper - I have tried moving back and the problem I had was trying to keep the spires of the castle as close to the top of frame as possible. If you move too far back and zoom, the high bursts do become larger; but, also change in height in relation to the Castle. My goal was to get the "Blue Fairy" burst to go directly at the the top of the highest spire and centered. Oh, and I only really wanted the single burst for it too to sell the idea of the Blue Fairy at bit more.
EpcotServo - that picture is a thing of beauty. Crow T. Robot would be proud. You should use it for the next Invention Exchange.
Just a little housekeeping and responding to some of the earlier questions:
chuckie - Yes, that is an Evolt E300. Not a bad camera for a beginners digital SLR. I've recently picked up an E-510 for cheap that I'm not sure if I like better. I will eventually switch to either Nikon or Cannon for a full frame sensor camera that can shoot really high ISO with little noise. Perfect for taking those ride pictures. Yes, those pictures were from atop the Contemporary at the California Grill's observation deck.
dmbouton75 - I'm not a professional photographer, although, my wife keeps telling me to start shooting. I just don't know if I'd like to do that because if you start doing something you like for money, it may take some of the fun out of it.
dixiegirl - Night pictures are actually pretty easy. I find properly exposed daylight pictures to be far more challenging as you really have to combat the ever changing sun and shadows you get. You must have a tripod and simply need to set up for long exposures at a high f/stop. For example, my camera has a sweet spot at around f8-f12. I simply set it up in manual mode and the aperature, then adjust the exposure length to pic up the right number of light. Then I take the picture into Adobe's Lightroom to tweak it. The pics at Hollywood Studios were hard to get with all the neon. They would blow out easily and took a lot of tweaking to get right.