I am super excited for you, and dont worry you arent getting annoying.
I would have to add something to Animal Kingdom...go see Festival of the Lion King as well, it runs at several times during the day.
As for where to watch the show/parades:
Wishes Fireworks (in Magic Kingdom) - I like to be just at the point where Main Street ends (toward the Castle), if you stand too close to the Castle you miss the big picture of the fireworks. You dont need to get to your spot any more than 15 minutes before the show, its a large area.
Spectromagic Night parade (in Magic Kingdom) - I also like to be on Main Street for this, I also advise to go see the second parade, however I would give yourself about 45 minutes to secure a curb side seat...it makes it seem like you are in the parade.
Illuminations (Epcot Nighttime Fireworks) - I stand in Norway, I advise getting there about 35 minutes early to get a spot right on the fence/edge of the lake.
Fantasmic (MGM Nighttime Show) - This show is just too cool, go ahead and get there about 45 minutes to an hour early, you dont want to be too close because you miss the big picture again...sit right in the middle (if you can) about 3/4 of the way up the theatre.
Again, this is just my preference, when you get there and you want to adjust do it...it wont ruin anything and I guarantee you'll still have an awesome time. :wave: