exactly ! i was afraid for a moment that i was the only one preferring B 😀 
it feels the most warmly welcoming to me and least coldly corporate, and tells immediately what it can be used for right now
i mean it's absolutely great that you can potentially build decentralized eBay and robot swarms and whatnot on it, but a new internet protocol is so a-specific
the only thing i'm really missing there is something that screams "nostr" branding like a ostrich logo in A 

 I see all 3 as having a target audience. Which I recommended, would depend on who I was talking to about it. 

I dont know if I would add the ostrich or not 😅 It's very calming as it is... maybe transparent on the background? Lol