Contrariwise, I find that I enjoy the research/planning stage of a trip even more than the actual trip -- my standard sentence while reading up on a new attraction is 'Wow, that's so cool!!' Thinking ahead to how the days will unfold leads me to some very happy daydreams.
Once you're actually there, you can be as adrenaline-pumped or as laid-back as you want to be. But without laying out as much groundwork as possible in the leisurely, calm, non-hot-and-crowded-and-cranky comfort of your own home, you can easily be overwhelmed by the parks and end up missing out.
One of my great pleasures is wisely zooming straight to a hot attraction at the beginning of the day and getting on with almost no wait, and then walking past it later in the day and seeing the throng standing in a frazzled line under a sign that shows an 80-minute waiting time.
Put another way -- spontaneously deciding you want to ride the ToT twice in a row is just fine. Spontaneously deciding that the ToT looks interesting, and standing in the middle of the walkway unfolding your park map so you can see what it might be, and where it is, then deciding to see something on the extreme other side of the park, then deciding to go to RnRC, then going back over to the Sci-Fi Dine-In Theater and finding that the wait time is prohibitively long just when your whole group is worn out and crabby with hunger ... lacks an element of fun.
