My most memorable milestone was getting a curie upvote for a post i wrote on learning japanese. It felt so good. I had actually been made fun of for learning japanese but on steemit I was able to make good use of it. My next milestone would be to write a really great story and become a better writer. Maybe it will be a story series. I celebrate my milestones by spending the day lazying around and grinning like an idiot. lol.
Congrats on your milestones