I'll defend FF3 as having some rather good music for a NES game. As someone who doesn't really have the nostalgia effect (I played all three games within a relatively short span in my late teens), I thought FF3 had clearly the best battle themes of the original trilogy, and some other good tracks as well. That said, the choices for non-battle stuff in Theatrhythm itself is... questionable. I don't care for Boundless Ocean, or the Crystal Cave, or Doga/Unei's theme, or Elia's theme, for instance. YMMV.
FF2 has some scattered good tracks (Rebel Army is a classic, although it doesn't lend itself wonderfully to Theatrhythm) but isn't great overall, yeah. FF1 competely kills it (and FF3 for that matter) on dungeon themes in particular. Well over half of FF1's dungeon themes are enjoyable to listen to which is phenomenal for a NES RPG.
FF7 - So I did 19k damage with a single Deathblow/Added Cut from the Powersoul against Jenova-Death, that was a thing. I'm not using elemental defences much for once (Rune/Gigas/Wizard Armlets hype), and as a result Schizo was by far the hardest boss in the game so far. ... but not very hard.
Kid Icarus Uprising - Beat the game. I did in fact set one new personal best, beating Chapter 24 (the penultimate one) on 6.0 intensity, which means I have now beaten every chapter except 22 on that difficulty or above (22 is satan, brutal air battle followed by possibly the game's hardest boss). Otherwise I feel rusty. Going to play some more; haven't decided if I should shoot for beating levels on Pit Must Die mode or going after some of the trickier achievements which still elude me.