Nininuninu... What to do, What to do...

I've been wondering... I've been thinking of writing a short story... I already have at last three plots in mind but I'm having a hard time deciding which language to use. I think I'm comfortable enough to write in English. But I feel that I'm able to express more emotions in Tagalog. Writing in English might make all my characters sound alike. With Tagalog, I can be kikay, bading, perhaps even astig. However, I'm a lot more sarcastic and bitchy when I write in English... Haaayyyy... what to do, what to do...