2C-E trips are very malleable ime. Well maybe not "very" but much more so than I have experienced with other psychedelics. As said above, the word "neutral" comes to mind. I feel like 2C-E is something that you can "work with", while with mushrooms for example you just have to surrender. I had one very therapeutic trip on 2C-E which concerned my tobacco addiction at the time, which enabled me to see through some of the mindgames I was playing on myself and consequently I was able to quit without any problems. This was, contrary to what you might expect, not an emotional experience at all, but had more to do with cold logic (in the most positive sense!) and a very matter-of-factly realization that my actions were not making sense anymore. It didn't even seem to be that big of a deal at that moment, not like some big revelation, just an interesting thought that I hadn't had before. Only when I actually tried to stop smoking months later and discovered that it was one of the easiest things I ever did, it began to dawn on me how much of an impact that trip had had on me. It wasn't a big dose either, maybe 15mg iirc.
About the "strong but not overwhelming" dose you asked about. For me that would probably in the territory of 18-22mg (orally), but I also remember reading a tripreport by Xorkoth where he seemed to have been pretty much "lost in the deepness" on a <20mg dose iirc. When I first started experimenting with 2C-E I was very cautious because of what I've read about the steep dose-response-curve, and slowly over time increased the dose no more than 2mg at a time. Over time I found out I'm a little hardheaded when it comes to 2C-E and 4mg increments probably wouldn't have been too much for me, but it's always best to be careful, right? So take from that what you will.