I don't give much conscious thought to my style. This is a quick introspective so it might not be complete.
I feel like my writing style is serious with a dash of humor. I take special care to make my writing easy to read. That is my hashtag one priority. The "dash" of humor comes in the form of light-hearted commentary instead of outright jokes. When people read my writing, I generally want them to leave on an 'up' beat compared to when they started, even if the content is dark.
In terms of "dark" or "gritty" or etc., I think I tend to try and avoid writing in a "color palette". I feel like my delivery tends to be dry and factual - which is not for everybody. I don't depict things that are overly gross and I've only been criticized a few times for being "too spooky". You could say that I impart a certain amount of "grit" into my writing but I also tend to leave the less interesting elements to the imagination. As an example, I simply refuse to go into detail about how my characters end up shitting in the woods on long journeys or exactly what they do with the soap during a bath.
It is difficult for me to spontaneously generate a scene because I always have to ask myself what came before this instance.
Bam! There is a fight! This should be fun for my players. But WHY is there a fight...? Who is it between? What is their motivation? Etc.
My encounters as a GM tend to be tense and plot driven. I take care to ground the events to in-world reasons and there is generally always a way around the fight itself; not that I plan one out but I leave the possibility open for the players to find a way around it.
It can sometimes be frustrating to play with people who can be spontaneous. Sometimes it creates a cognitive disconnect that I find difficult to overcome. This is a failing on my part but one that I recognize. I stick to my strengths, although I do enjoy testing myself at times. Other times, however, I tend to get along well with creative people since I have a better time working with something that already exists instead of creating things from scratch.
I might have gotten off topic.
I am somewhat realistic with a focus on ease of reading and a dry but upbeat tone.