Dynamic Playlist niftiness

One of my most loved Amarok features are dynamic playlists. For those who don´t know how they work a little guide is availible.

I use a tweaked random for my dynamic playlist. Amarok is told to play music from a smart playlist which contains all the songs I rated with more than 3 stars or did not rate at all. I don´t want to listen to music I have listened to within the last month. So I exclude that as well. This makes my smart playlist. In Amarok it looks like this:

And now I use that as a seed for a dynamic playlist to make Amarok add and remove songs from my actual playlist and by doing this keeping it tidy, small and going on playing music for weeks if I want it to without me ever having to add or remove songs from the playlist (great for parties btw). If I feel like playing a certain song I can of course always just drag it into the playlist and play it. In Amarok my dynamic playlist looks like this:

And this is the result

I am pretty sure others out there use even cooler and more useful dynamic playlists. Please share. What do you tell Amarok to play for you?