Me too. I always feel vaguely rude/dismissive when I use them, because I'd never type that way. It's a very jarring product decision, given that Claude itself uses perfect capitalization and punctuation.

No idea why they did it. My only guess is that maybe it makes it obvious in your chat history which replies were recommendations?

I've sometimes gotten title case, but yeah it's really annoying because I'm not big on all lowercase messaging.