That's probably because they are either highly rated or you listen to them a lot.
Radio also learns from what you skip. So if you don't like something, skip to the next track. If you do that before the mid-point in a song, it counts as a skip.
Sorry. My previous post was a little unlcear.
The Foo Fighters and Dave Matthews tracks that the Play Radio feature selected so much of had never been played or rated.
I have a folder called Temp Music that holds my music files that need their tags updated (missing date, missing cover art, no rating, things like that). The Foo Fighters and Dave Matthews are two of 33 other artists that I currently have in this location awaiting tag maintenance.
Throughout the day, the Play Radio mode selected way more songs from this location than songs from other locations in my MC Library.
To give you an idea, in the last 40+ minutes, 5 out of 11 songs have come from this Temp Music location but this location only represents .02% (not 2%) of my entire collection.
Anyway, cool feature! I'll keep using it and let it do some learnin'...
This is interesting. As I copied my "Listening to:" info into the post, I realized most of the files in this Temp Music folder are missing the album tag.
Listening to: 'Aurora' from 'Unknown' by 'Foo Fighters' on Media Center 12
Maybe I'm getting a lot of songs from this location because almost all of the files will have the same album tag of "Unknown"?
Just a thought...