A Variant

So, I make a lot of 80-minute playlists in iTunes to burn to CD and listen to in the car. Each of these mixes has some unifying theme or topic (except one, whose theme is "songs I want to listen to that aren't in any of my other mixes"). What I'm going to do now is pick several of those mixes and post the first lines of four of the songs from each (according to previously described principles). No points for just identifying the titles of the songs; your target is to identify the themes of the mixes. I have no idea how difficult this is, but I think it might be fun to try? Seems like it might be a collaborative game, rather than a see-how-many-you-can-get-on-your-own game.

Those of you who already know some or all of the answers by virtue of being familiar with some or all of my mixes: please don't give away the answers if you just recognize the song lists! Helpful or snarky hinting or commenting is encouraged, though.

( Showtune-only mixes )

( Variety mixes )