Our favourites so far are a request to show a cast icon in the status bar when casting something, a request for better Quick Settings (I think we all want that), and a request for an NFC unlock capability.
It’s a bit dry if you’re not a developer or don’t understand some of the inner workings of your Android device, but it’s also a good opportunity to let Google’s developers know if you’ve noticed a bug in the preview that others may not have seen, or have a great idea for a feature.
Have you found bugs in the Android L Developer Preview? Let Google know! … but you can also tell us in the comments.