First, I have noticed a few posts where a person asks how to do something to which people respond, "it's not possible." The truth is, "it's not possible" is very rarely the correct answer and if you think it is, don't answer the question because you are probably wrong. In one case, one of the forum moderators told a user what they wanted was not possible, after which I posted a couple different examples showing how to do what the user wanted.
Next, I learned that there are too many times users rush to the forums to ask a question, thinking they will save time instead of searching the manual, tutorials or even previous topics. This winds up making the user wait a day or more before they can continue their project when a search would have taken only 20 mins to a few hours. In trying to save time, they wind up wasting it instead. I have used the software for more than 3 years and have not once yet created my own question topic because every thing I needed was already documented. This isn't to say there aren't times people might need a little more explanation for which the forums can be very handy. Just that a little research can save time and frustration.
I've learned that, while the information about C2 says you can make games without any programming, having a good understanding of programming techniques goes a long way toward making it easier. I am constantly using programming techniques to lessen the number of events I use and when answering questions in the forums I like to try to share some of these enhancements. The truth is, C2s event system is really an image based programming language. When we setup up our events, we are programming the game.
I've learned that people think C2 should make their game for them when in fact it is a tool. Like all tools, it's only as good as the person using it.
I think the most important thing though is, I have learned a lot about C2 simply by trying to answer questions other users have had. There are so many creative people in the community that just need a little information on their projects and taking the time to help them work through these has really pushed my own skills. If you really want be get a better understanding of C2, open the How To forum and try to answer questions there.