Here's mine:
When I lived at my parents I was used to draw everywhere too. But I always pictured myself a decent workplace in my own home for drawing and other creative stuff.
While looking for a home I had in my head I needed two bedrooms to accomplish this. I turned the smallest one into an actual bedroom, the biggest became my workroom. There's a lot of bookcases in this room as well.
I got the four matching tables from the library I work at (when they moved to a different place, these were marked as trash). I usually have one designated for my markers as you see in this photo, while the last one (bottom) varies a lot. All the way in the back (top) are my scanner and printer. I still want to add a memoboard to that wall on the right.
I put all the tables in a row in front of the windows, where I look out over my backyard and high trees in the back. I sometimes get distracted by squirrels.
I also like having my computer screen next to a drawing spot. However I deliberately kept so much space round the screen I can also draw in front of it (really usefull when you google references). There's a cheap A4 tablet hidden underneath my keyboard, I sometimes use it for coloring.
I am righthanded though my mouse is on the left. I had RSI once while I still needed the computer for work, so I put it on the left to continue working. I got used to it so quickly I left it there to prevent it from happening again (keeping my drawing hand "clean").