The fact is that "hearts" are there only to train the For You section. Nothing else. They are a general "oh, I like it" while you're listening to a song.
To do anything different, you have first to add that song, album, playlist to your music and then treat it like it was before Apple Music. For example, using the 5-stars system in combination with smart playlist (that, however, can only be created in iTunes) you can have a Favorites playlist that gets constantly updated. And so on.
Considering the last question, that is the worst issue about Apple Music: there's no way (at least that I can find) to switch to the artist page when listening to a song. Frustrating.
I'm still not seeing any effect on the "For You" section based on albums that I have hearted in "My Music". However I am seeing recommendations that make absolutely no sense based on what is in My Music, Purchase History or based on input from the initial Apple Music setup process.
It would be nice if My Music gave you a hint as to why something was being recommended... e.g. This selection has been recommended based upon what we found in My Music or Purchase History or Initial Setup or a Paid Promotion or whatever.
edit... actually it is worse than that, I am seeing music in genre's being recommended that I specifically did not click on during the initial setup, e.g. "Pop" (and nothing in My Library would make anyone think that "Oh, we should recommend a bunch of "Pop" music to this person either). Strange, I'm sure they'll get it sorted out though.
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