I'd suggest 2c-b. In my experiences, it poses the least threat to you emotions and has the best visuals. You can control it very well (unless you really take too much) and it feels the most natural of any of the 2c-x's that I've tried (all others really feel synthetic).
2c-i is a bit harder on the body, and can send one into emotional panic, like a bad LSD experience. Some people love it, but it's more of an aquired comfort IMO. I have enjoyed it, but not until my 3rd time using it.
2c-e would be my suggestion amongst these 3. It felt like a more gentle version of 2c-i to me, though I might just have been in a better setting when I used it (and I had a smaller dose). I was able to control it (unlike 2c-i) and used it to effectively highten music and such.
I've never used 2c-c, nor know anybody personally who has. It's the rarest of the ones you've listed here, and you probably want to start with something a bit more popular. If for nothing else, so that you're comforted by the quantity of good experiences listed.
I would say NOT to do any of the 2c-t-x's. Those tend to be the worst of the 2c-x family.
Also, be cautioned that innate tolerance to 2c-x drugs varies widely between people. I'd say the varience is much wider than with LSD or psilocybin. So start low and work your way up. I love 2c-b and all, but I definately started way too high - it being my first 2c-x drug.