First I showed them to Mark Chiarello of DC comics. He had a notebook with examples that he used to illustrate his advice. For example, one thing he told me was my backgrounds looked faked and he showed some examples of cityscapes done right from his notebook. He told me I had lots of work ahead of me, but I had potential.
Then I signed up for a portfolio review from Marvel and Chris Claremont and Len Wein looked at my pages. They were encouraging, but like Mark they told me I had a lot of work ahead of me.
After the con I was approached by a former coworker who was working for a place that did 3d animation. He tried to get me a job there so I spent over a year learning 3d animation and trying to get a job with his company. While I kept drawing comic samples periodically, it was a distraction that never paid off
Which is too bad because things were starting to get good.