Listening

I think Bach and Hindustani classical represent the best music ever created.

I'm also a fan of electronic music. I love Radiohead, one of the few bands that can consistently point to where things are going. Check out Kid A, In Rainbows, and this live performance. Other favorites include Boards of Canada, Aphex Twin, and Portishead.

Bach

• The Goldberg Variations, Glenn Gould - check both 1955 and 1981 recordings, and this live performance. Lately, I've been preferring the 1981 recording.
• The Art of the Fugue, Grigory Sokolov. Sokolov may be my favorite pianist these days, you should go down a YouTube rabbit hole of his music.
• Mass in B Minor, Gardiner and The Monteverdi Choir. Listen to a live performance of this if you can. Transcendental.
• Brandenburg Concertos
• St. John Passion, Gardiner and The Monteverdi Choir
• St. Matthew Passion, Gardiner and The Monteverdi Choir
• Double Violin Concerto in D Minor, Oistraikh and Menuhin

Hindustani classical

• Rāg Madhuvantī / Rāg Miśra Tilang, Shivkumar Sharma and Zakir Hussain
• Raga Shuddh Kalyan & Raga Suha, Kishori Amonkar
• India's Master Musicians, Ravi Shankar
• Shahen-Shah, Nusrat Fateh Ali Khan. Can you put Qawwali under Hindustani classical? not sure. Check out Fareed Ayaz on YouTube as well, particularly this and this.