Something else I just thought of.
'twould be nice if one could first select the SONG and only then the character he wants to ride it with.
This way, you could open a song you like, analyze what kind of ride it is (high traffic, low traffic, downhill, uphill etc) and then decide what'd be the most character for it, without having to reload the song.
Maybe you could also check the tags you want to use here.
EDIT: Maybe the entire before-you-start-playing-the-song-screen could use an upgrade. As said, choosing which character and tags you want to use, but also already show the scores here, so you know what you have to aim for.
On the other hand, not knowing where you'll be in the scoreboards always is somewhat exciting.