For me it is in my office, which is a place my wife has decorated, but in which I have introduced
boyish manly props, to try to make the setting my own.
I am somewhat of a scatterbrain, so I will jump from this interest to that while trying to write. I will read the news, then watch some horror prank youtube clips, then I will get caught up in my Twitter stream, and try to catch up with what interests me in this world.
Then I will write some words, lose focus and wind up at Instagram, looking at all the nice pictures that people deem fit to upload. (I have to confess, their threshold of uploading pics is lower than mine).
By now I realize that I have to produce something, so I turn on classical and/or theatrical movie music for fantasy or sci-fi films. Then I start a typing, and I type and type for an hour or three. Then I get caught up in an interesting turn of events, and I -need- to make it grand, so I lock my workstation and leave my desk.
I go for a walk, for an hour or two, and I think about what I should write.
Then I return to the workstation with whatever ideas I got, and I write them down.
I used to be better at this process, and ten years ago my field trips would include me, whispering and cursing, preparing for my roleplaying session with high pitched shrieks and low grumbles.
Yes, I got a few odd stares back then... but it was fun.
Oh, and my preferred workstation is a 2 year old gamer PC. It has the most comfy setup, but I also have numerous laptops I could utilize. Currently my Asus Gamer's Republic laptop is my laptop of choice, except for watching movies, in which case I use a smaller Lenovo Yoga 2 Ideapad. Earlier I used a 13" Airbook, but it seems dated now.