"Sure" is up there with "maybe" for me. Blood boiling stuff. 

I get that. People also say ‘sure’ sarcastically so without the exclamation point it feels like whatever they’re responding to they’re not excited about. I do have a habit of saying ‘sure’ but only when I mean it. If I’m not feeling whatever is asked I’m more of an ‘I guess’ person rather than a ‘sure’ person. 

What do you think of ‘yeah’ with no punctuation?

“Sure” is def code for “you have done me wrong, and I will never forgive you.” *shudder*

If I respond with “sure,” I’m trying to passive-aggressively let the individual know that I’m not 100% happy with them. It’s not the most mature move, sure, but, as a millennial, I know no other way. 

Whenever someone replies "sure" -- no exclamation point! -- I feel like they're saying they're disinterested or pissed. For example:

I literally hate when anyone responds with a "sure" -- no exclam! -- because it sends me into a spiral. It feels like they're saying they'll *do me a favor*. That's the vibe I get. And I hate it. 

If you reply with a "Sure" -- what is your problem?