I've read other people's reactions to their agent and/or editor revision notes, which often seem to start with them freaking out about how much they'll have to do and then eventually calming down, accepting it, and getting to work.
For me, I read the notes from my agent upon arriving at work in the morning and thought, Wow! That's ALL? That's so easy! I can finish in a few weeks, no problem! Yay!
Then I reread them after coming home from work twelve hours later and thought, Hmmm. Maybe this is going to be harder than I thought.
In any case, I'm glad to have the notes, and I'm very ready to get to work on them. It was a year ago on February 17th that I "finished" revising this manuscript. Since then, I've done tweaks based on feedback I've received. I also completed that tiny revision in December. But for the most part, I've been away from this project for the better part of a year now.
I've had lots of people read the manuscript (or pieces of it) and offer opinions, but this is the first time I've received feedback where I'll have to make the changes and then send it back for review. I think revising for someone other than myself will be a very different type of experience!