In some ways, I wish I would have tried to do more with them, but then again I think something inside made me want to wait to mature as a writer and as a person. And no regrets, there is only now. And speaking of now, I've written a 9th novel, working title The Obamacare Experiments, and now I'm pursuing a traditional publisher for that one more rigorously.
Find an Editor
One thing I've come to understand is that you have to invest in your product. That means you need to seek out a professional editor. It's expensive but it must be done, for four reasons.
First, it's the best way to learn. It's like hiring a tutor.
Second, writing is a collaborative process. It is very rare when a person can just write something down and have it published (maybe impossible). You need that professional with credentials. Why? So you will trust their recommendations. Preferably, you should find one from NYC with publishing experience, again expensive, but worth it.
One more piece of advice on the selection I might offer: if you're a woman, find a male editor and vice versa. This is not a hard and fast rule, by any means, but in my own research (anecdotal though it may be) I found that this dynamic seems to lend itself to creation of a better product . . . food for thought.