Too much detail?

[Super Buu]

Depends on the person. Personally, I like just enough detail to get immersed, but not so much that the story is literally a static picture. I tend to focus more on action and character interactions myself, but when it calls for it, it's definitely advantageous to be able to describe your surroundings in an interesting way. Just make sure you always, always follow the "Show, don't tell" rule in Bardock's Roleplaying Guide. As in, don't just list off the details - weave them dynamically into the progression of the story.