My first 78 was The three bells (aka the Jimmy Brown song) with the Companions of song.
My first LP was either something by Arthur Lyman or Art Blakey and the Jazz Messengers.
Never bothered with 45s and can't remember if I bought any EPs.
My first CDs (on the same day) were that Paul Simon one with Diamonds on the soles of her shoes and The Battlefield Band's Bad Moon Rising.
Most of my vinyl and CD collection is "folk" though.

Cheers, Rowan