Don't need to be sorry. Just do like me and dig for old models and listen to them again! Great fun!
Great idea!
My KZ appreciation came from AS10. Amazing BA bass, gentle treble, grainy sound of less-dampened BAs, nice resolution. Still love it, especially for string quartets. AS10 survived all the heavy use perfectly (the second one is still unwrapped, the only duplicate in my 30+... collection).
Beautiful anodized aluminum shells of BA10, and I learned to fit it (!)
Old trusty ED9.
Tiny cheerful ZSA.
Different colours/flavours of ZSN, ZSN-pro - ear candies
My first KZ - ZS10, a bit quirky but with a lot of interesting traits.
Sparkly ZS10-pro - the zenith of good "steely" sound, worked really nice for electronic music to my ears.
Austere AS06 (less BAs is less to me), amazing for solo cello music.
AS12 - did not work for me as is in timbre, but with treble filters removed (great tips of the HeadFi) - my sparkly gem, more cheerful than A10 of CCA.
That brings me to CCA, which I so far collected all 6 (all are really nice) and especially enjoy C16, C12 and CA4 - the best simple design to my tastes, nice periwinkle colour, and simple nice sound of a V (W?)- shaped single BA hybrid.
Indeed, KZ and CCA, I very much miss your new promised IEMs -C18, C20!?