I miss Tiger as well. It was very pleasing to look at. It's one reason I dug OS X. If I have to stare at something all day, I want it to look nice. Full screen terminals running tmux do not do it for me. Now everything is literally flat and boring. boo.
It's a shame, because I'd love to use Tiger as a distraction-free environment. I'd even try and build a controller app for Tidal or Spotify so I could still have modern music streaming facilities. I spend a lot of time SSH'd into servers anyway so the lack of modern compatibility doesn't matter as long as a terminal's available.