Ethereum vs Cardano vs Polkadot is such an interesting debate because they're all born from the same core group. Charles Hoskinson and Gavin Wood are both Ethereum co-founders. Hoskinson's vision for Ethereum was to be "the Google of blockchain" as a for-profit mega-corp. Wood's vision was for Ethereum to be "the new internet" as is responsible for coining "Web 3.0."
Being "the Google" is certainly a model for success, and so is "being the new internet." They both have so much potential that it's hard to make a case for which one might be better.
I agree, though, and I like Polkadot, too!