I've found 2C-B (generally at 25 mg oral) to be quite gentle and friendly, mentally, on the four or five occasions I've had it. I've been freaked out by mushrooms, 4-AcO-DMT and 2C-E, for instance, or at least confronted with some fairly uncomfortable stuff, on a fair few occasions. I'm sure, in the right circumstances and dose, 2C-B could do the same - it's a psychedelic after all, and can lead your mind down unexpected paths. But personally, I (at 25 mg) and a friend (at more like 12 to 15 mg) have found it pleasant, strange, and not at all conducive of freak-outs.
But this is based on taking it only a few times, in comfortable and untroubling situations and locations. Your experience may differ.