That happened to me. I lost interest in the way I wrote, and the quantity of the writing I produced. My old fanfiction.net account had more than eighty stories hosted on it, and I churned out short-stories and one-shots like you couldn't believe. I remember writing a single one-shot, liking it, writing another to follow it, deciding, "Oh, one more couldn't hurt..." and by the time all was said and done, it had turned into a seventeen-part series of excruciatingly long one-shots all about the Turner family from
Pirates of the Caribbean.
I don't think I could do that now. Towards the end, I put four stories on hiatus because I just couldn't keep writing for them. Two of them (Harry Potter ones) were ones I felt very badly about doing so to, because they were both popular and received tons of reviews for every chapter I posted, and had a million subscribers each...but the inspiration just wasn't there anymore, and I chose to leave them where they where rather than force myself to write mindlessly just so I could finish them.
Now? I have
No Man's Land hosted here, on Mibba, and I'm lucky if I can update once every couple of weeks. Part of this probably has to do with the length of my chapters, but I just can't churn out writing like I used to. I post a one-shot every now and then, but not like I could a couple of years ago.
On one hand, it does kind of sadden me that I can't write as much as I used to. On the other...I've slowed down a bit, and allowed myself to really look at what I'm doing. Because of that, the
quality has improved. But the interest I used to have still isn't there.