Topic 1. One track comes to mind, the opening of Tales of Phantasia on the Super Famicom, a vocal track with that level of clarity is just amazing for the system.
https://www.youtube.com/watch?v=DPtyPToDt6g
Topic 2.
Mah Treasure games.
Mischief Makers - Boss Theme: https://www.youtube.com/watch?v=azc-uHxJh1E
Guardian Heroes - Rough and Ready: https://www.youtube.com/watch?v=CAgMNew9H9c
And mah Atelier series
Atelier Ayesha - Yesterday's Opponents are Today's Ingridients: https://www.youtube.com/watch?v=LJJK21-wanY
Topic 3. I don't know if it would fit me, but I'll share my favorite song.
https://www.youtube.com/watch?v=e9r5hx47kxM