While I was certainly impressed the first few times, I think it was because I wasn't sure how the final product was going to come out. Now that I feel I have a little more control (I'm still a bonafide noob) of the process, I don't think the results will be as jaw-dropping.
Also, I've noticed the change from one stage to the next is sometimes so small that you really don't notice the small changes. But if you looked at a before/after shots, it would be a big difference.