[jacobobryant]

I think some areas will be correlated and some will not. e.g. I see plenty of overlap between articles, podcasts and books, but less overlap between those things and music.

I'm pretty curious to see what the correlation ends up being.

[aabeshou]

I agree. I think it's definitely worth trying and maybe you can update the algorithm later to take advantage of the domain correlations you find.

[jacobobryant]

That being said, music etc. is at least correlated with demographics. I could see it being useful to a degree for recommending other content types.

[aabeshou]

Id be surprised if you get much signal out of demographic info.. but I would think music correlates more with general aesthetic taste which may transfer.