Mavericks so far sounds great, but there are still two improvements I am looking for, since Notification Center in Mountain Lion was a bit of a disappointment. 1) Can I set variable snooze times for Calendar notifications now? It drives me crazy having only a 15 minute delay for these, and makes the feature almost unusable. Since they're now giving Calendar alerts for things like driving time to a particular destination, it's hard for me to believe they would overlook something like this. 2) Can I set the Notifications to appear in the bottom corner like I can in Growl? Like if I want to leave a notification on my computer as a reminder, it is much easier to have this in the bottom corner, where it wouldn't interfere with my Safari browsing.