I can't say I have any one moment in particular that is memorable with ETH. I mined some early on. I was airdropped a bunch that I still hold. I've used some to play around in the metaverse and with NFTs. I really like ETH, but the gas fees have always been a deal breaker for me. That's why I've sort of embraced MATIC as the coin I like to play around with these days. Getting airdropped a bunch of ETH definitely sent me down a fun path of exploring what can be done with crypto besides holding/spending it. I guess the education on tokens and smart contracts as a result would be what I would find most memorable. Without ETH I would never have learned how to mass produce generative art or write a smart contract.