The sentence "it depends on my mood" is correct and can be used in written English. You would use this sentence when you are undecided about something and your opinion is subject to change based on your mood or feelings. For example, you might say, "I'm not sure if I'd like to go to the beach or a concert. It depends on my mood.".
It depends on my mood and location.
"It depends on my mood," Allen says.
It depends on my mood on the day.
"It depends on my mood in the morning," she said, laughing.
They say things like, "Sometimes I can have my cell phone during dinner, it depends on my Mom's mood".
"Sometimes," she said, "it really depends on my mood".
It all depends on my mood.
Being a terminologist, I care about word choice. Ludwig simply helps me pick the best words for any translation. Five stars!
Maria Pia Montoro
Terminologist and Q/A Analyst @ Translation Centre for the Bodies of the European Union