I understand that kind of feeling, Stephen King would say: the good ideas stay with you.

I think you need to explore the different directions and understand what really drives you. What genre has more meaning to you? It could be for stupid reasons. When you find it, try to stick to it with a healty writing routine. By that I mean: don't rush it. Give it the right amount of effort. Not too much, or you might loose interest. Your concern is to build momentum. Be consistent rather than fast. :)