Not originals [:-p] I kinda landed/instantly found my niche musically as a youth in about '75 and went forward concurrently from there (and later via Motorhead, Iron Maiden, AC/DC) until music finally lost it's way for me c82/3. Then I progressively went backwards and discovered styles/bands from say '65-75, like the formative pre-cursors of punk via the Velvet Underground and psychedelia etc into the New York Dolls and so on; The Doors, King Crimson, Yardbirds, Focus and many others.
Moved to Japan in the 90s and discovered techno/dance/house. Enjoyed that, as it had a very poor/druggie rap back home then. So I got to understand it in entirely appreciative and convivial places [the legendary Juliana's Tokyo club, etc]. In fact that's when The Prodigy first crossed my radar, they were a club/dance band back then, that morphed into more alt/heavy in later years - always easier to get a band if you know their evolution.
Strangely, Japan being Japan, they have a thing for British 'early music'. So in parallel I suddenly found myself buying CDs of such music dating back to c1200AD. I found it fascinating, it's impossible to fail to see parallels with say Jethro Tull, prog-rock, and hence how rock and music evolved post 1930s [from Delta blues].
That's a few core elements, blues and jazz get look-ins too. Curious how my taste and learning has evolved, like the tides ebbing forward [concurrently], then back again [for the roots/origins]
Lucky for you having that early stuff! T-Rex, that's a name I haven't heard in a while

I recall the glam-rock period well, T-Rex, Mud, Slade et al...

The first chart '45 I ever bought was Alvin Stardust hahaha.... and Lucy in the Sky with Diamonds - Elton John. Surprising how few people realise the latter was [the now] 'Saint Elton's' cover tribute to dropping acid [i.e. LSD - surprised SG never banned that one

]
If you had to pick one Desert Island Disc what do you think it might be?
[FWIW: Mine miiiight be the album Rattus Norvegicus by The Stranglers]