Glad you got things up and running, Laura!
Julie - I love Reminders! iCal has had tasks forever, but you couldn't set up recurring tasks, and you can do that with Reminders. And, it syncs with your iPhone, if you have one, automatically.
Power Nap - I don't know. It does seem like a cool thing, but it also seems like something that runs in the background so you won't really notice it much. And, I haven't noticed it. LOL.
I have never liked Font Book all that much. It always seemed to slow my computer down, and it didn't have many features. I use Fontcase right now. But, I may give Font Book a try since they seem to be fleshing it out a little more.
The dictation is pretty cool. I can see myself using it quite a bit, if I can remember that it's an option. I forget about so many of these cool little features, so I have to force myself to get in the habit of using them more.
The improved scroll bars are another thing that I haven't noticed much. I never had any issues with my scroll bars before anyway, so . . .
I guess that wasn't very helpful for you. LOL. I am really liking the Notification Center. I like the status bars in the Finder now that show your download/copy/move progress. It's one of those little things that just made me happy. The other thing I like is the new way to browse through your open tabs in Safari (with track pad gestures). I also really like the Airplay Mirroring. Very cool. I like the VIP mailboxes in Mail, and I've been enjoying the Messages program for a while now, since I was using the beta version of that.