There are definitely many good memories I have of DD, but the main ones that come to mind are:
1. Someone I met in a public game that I ended up playing with almost every day for months on end when I was just a new player. They showed me the ropes, gave me a little bit of gear, and guided me on how to improve and become just as good as they were. They no longer play, I have them still on my Steam friends list and will always remember all of the good times I had with them.
2. When I got my first, and only, Ult++ from lab. I was so happy and figured this was my ticket to get an actual supreme set of armor for one of my builders. Little did I know, but quickly learned with the help of many of the people from the forum / Steam group, it was worth way more and lead me to make so much progress making the game even more enjoyable. That week or few days that I held that auction, I remember checking the forums every day, a couple times a day, and being filled with excitement seeing the bids go up and up. That was something I always remember about this game.
3. My last memory I want to list is probably when I finally took a look at the hours played. It is probably small compared to many of you, but looking at all of the hours I poured into this game and just knowing almost every single one was me having a good time is something that I will always remember.
Thanks for all the good times!