Your favorite 2C-X
...Created a poll as per the OP's request.
Please explain your vote when you make one.
Mine is 2C-E because it's shockingly deep and penetrating, primarily. Also, it's absolutely gorgeous visually, and although it can get physically rough at times, that roughness seems to be mostly psychosomatic. This chemical has really taught me a lot, and is one of three substances that have given me a +4 experience on the Shulgin scale. Out of all the trips I've had, 2C-E contained the most content. Its extremely logical drive intrigues me to no end.
As such, it's one of the chemicals that I hardly ever use, because it's just such an earth-shattering experience.
Second place is 2C-B, because it combines recreation with depth potential quite nicely, and I find its take on showing a person infinity to be very unique. Third place would be 2C-I and 2C-D, although 2C-D may change positions whenever I finally get around to taking a fully psychedelic dose of it. Finally, 2C-P will most likely go up in the top 3 somewhere, but I just haven't tried it yet, so I can't say.