I seems that there are a few songs in my collection that it will eventually play no matter what the seed. I have deleted a couple of these songs so I would not get sick of them. I will probably add them back after a while and see if the same thing happens. Sometimes it may take ~30 songs before it gets to one of it's favorites... It might be my imagination, but (to me) it does seem to favor recently added music so maybe deleting and adding a bunch of songs might mix things up a bit.
Yes, the abililty to specify whether an album/song is included in MOTS would be a great enhancement. For example, many Frank Zappa tunes are inappropriate for certain company, but I'd like the convenience of spinning the wheel vs. finding the CD.
Having said this, I do think it works very well 99% of the time. What I've found about it that I really like is that there's apparently a lot of music that I stopped listening to because I didn't like the entire album, or the album was "too long" (can listen to 15 minutes, but by 30 mins, it's becoming tedious). MOTS has reacquainted me with this music... a song or two at a time.
Stan