I made few builds and currently still have 4 kits ongoing pending (i know, i know that i also need to post the update hahahah) and out of all 9, I find the
Leisure Time Tea Room is my most happiest build
to date as of now.
It’s relate to tea time and SNACKS of course; yet come to think of it, it’s my first “room-based” type of any DIY miniature kits. You can also read my “acceptance” bout this kit here 
Kit 2 : Leisure Time Tea Room updates (Final) The Acceptance!
Why I choose this as the build that makes me the happiest or the most unforgetable is I could feel my internal progress and processing building miniatures steadly from the booknook (my first kit). I improvised some parts of it and make it my own version of Leisure Time Tea Room!
Currently, this build reside next to the Warm Dining Room, displayed for my guests to see them whenever they’re arrived at the reception 
I might need to learn how to do soldering and simple wiring properly cause I find having type C as power source is much more feasible in the long run than the current 2A batteries for this build. Wish me luck!