Gen-Z mode would get me more excited, interested to use the app for its intended purpose. Shouldn't all apps aspire the same?
HN's clean interface means you focus on the articles, and one would hope (though not in your case it seems) take it atleast a little seriously/professionally in how you interact.
A speed dating app like filteroff? It's more casual, you should be at ease, it shouldn't remind you of MS teams.