There was a fair amount of criticism from a lot of people within the crypto community who voiced their concern regarding etherium network, its stability, fork policy, scammy ICOs etc. It's still unclear whether they consider turning to POS any time soon. It's not decentralized as it depends greatly on Vitalik and his dev team. One must give them credit, though, that ETH is the second cryptocurrency in the market, closely chasing bitcoin. Then, again, ETC (Classic) has lower tx fees.

There are other options, too. Cryptonight-based cryptos, for example. And if you read https://steemit.com/altcoin/@valiozzi/palm-beach-report-leak-zencash-zen-viewed-as-a-newly-emerging-privacy-coin-with-huge-investing-potential, you will also learn about equihash algo coins.