Hey, NightNDay. Congrats on your commitment to quit. I think it is perfectly natural (and positive) to be excited about your decision. I think the risk of "shouting it from the rooftop" is that people who haven't experienced addiction can't truly understand it. It may lead to them making assumptions about your character, or interpreting your behaviors in way that is not accurate.
In the end, I think it is best to let most people see the positive changes as they come, without the backstory.
I've only told my significant other of the true motivation and extent of my commitment to sobriety. All the other just get "I'm not drinking right now."
Good luck to you!