Harmony $ONE is a project aimed at building a decentralised blockchain community. This aim reflects in the large number of active staking validators on the network.
I like $ONE mostly because of it's cheap transactions fees and ease of making HRC20 tokens on the network. I haven't heard of any Gaming Dapps deployed on Harmony yet, which may be due to the speed of transaction completion being a few seconds too slow.
The project is actively growing. I expect big things from Harmony in the future.