I feel it depends on what they’ve read/researched before doing so, and that will influence their initial bias. I signed up purely due to decentralisation, lack of algorithms, and the potential for using my nostr keys to “sign up” for the “other stuff”. Plus it was new and I like messing with new stuff). Watching it evolve is also part of the journey/experience. Sadly, I think many expect to find a fully fledged twitter clone with all the news and content that has after 15 years or so of existence and then to do no work curating their feeds/follows and instead are initially disappointed to find a large bitcoin-focused / nostr dev community (which I personally  love along with the memes and zaps).