In my opinion, there has not been anything on TV, before or after, including season 2 or 3, or Ancient Aliens, that could EVER top the first season of A/A. I have always been interested in aliens, space, etc my whole life, but nothing has ever set me on fire or changed my mindset about life, the way that first season of A/A did. It was so filled with hard to dispute evidence, and eye opening facts, that my mind was totally blown. I really don't think they could ever top that season. I have never thought the same about anything since I first watched it. Though season 2 and so far season 3, have not been as life changing to me, and the things they talk about are more based on theory and folklore, etc, I STILL find them fascinating and they give me so much food for thought. I look as forward to each new episode now as I did with the first season. Anything that causes me to think out of the box and think "what if" and just imagine all sorts of things is a good thing.
I will continue to be an Ancient Alien series watcher until they show the very last episode, which I hope will be a long time from now. And even after then, I will continue to watch the DVDs I have, and will purchase, of the episodes. I have so much to thank that series for. For giving me a new perspective of the world, who we are, and where we could have come from.