I mainly play Rohan Kishibe from JJBA and both Kaz Miller and Psycho Mantis from Metal Gear (Psycho Mantis pictured)
The lighting is great in this particular image because it's an MGSV edition Mantis and the game uses this kind of lighting a lot....
I have done all sorts of others in the past, like Levi and Armin from Attack on Titan (back when I cared about the series lol) Howl from Howl's Moving Castle... occasionally Hatsune Mikuo too, and once I went as Dante from Devil May Cry (cool red dante of course)
I've even done crossplays such as Annie (also AOT) and Maka Albarn from Soul Eater.
It's one of those hobbies, man. I always seem to come back to it.
The best thing I've got at the moment is Kaz Miller from Peace Walker, maid cafe version.
I once crossplayed as Yuno Gasai purely to accompany my friend's Misa Amane. The concept was to just be a yandere squad. It was a different time and my taste was bad. I was still a school kid back then. (yes I was shorter than her and fat in the face RIP)
I still like this image tho it has comedic value.