For me personally:

-Nostr is credibly decentralized and permissionless, with users controlling their own identities, without too much trade-off. Actually usable, bootstrapping, and here.

-Currently and in the future, users can choose their discovery algorithms, either by exercising choice over which client to use, or eventually toward a marketplace of algorithms available to a client that makes that happen. Nearly endless options for those that want it to happen.

-Nostr's social graph makes my Lightning wallets genuinely better. It gives them venmo-like social discoverability.

-The fact that it's a smaller community is currently an upside for me. I genuinely enjoy posting here. It gives me a place to vent about things or tell random mid-length stories that don't make sense to broadcast to 690k twitter followers or write a blog post about.