I've taken it a handful of times and just never been very impressed. Maybe I've never had good coke, who knows, but for such an expensive drug, the effects seemed not worth it to me. I don't know if you've tried mephedrone, but that gave the effects that I had imagined coke would produce, and is far superior in my eyes (although not as well researched).
I went through a pretty hardcore coke phase a few years ago so I "swore it off" forever which lasted a few years. I went through a mini environment-induced second coke phase recently and came out of it with the mentality that I'll do it a few times a year if it's around but it isn't worth my time or money in any serious way. I cannot for the life of me, however, refuse coke that is offered to me. I mean, c'mon?