Features of your media player of choice you didn't realize were awesome at first

[Daddy]

I'd give to give this title to iTunes' "Smart Playlist" feature.



I'm still making playlists(added 60's and 50's to decades) and I think this will be highly useful.  I'm also working on fixing genres and adding them, then I can make a Rock playlist and include all of the Rock subgenres(prog. rock, math rock, metal, etc.) and do it with lots of stuff. 

I love this feature.

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i love genius
anyway I WANT AN IPHONE ;_;