I'm deeply considering trying shrooms or acid. Not sure which yet. I read all through the debate going on in the shrooms forum. The main thing I'm concerned about is the possibility of flashbacks. There seems to be much less documentation of flashbacks from shrooms than from acid. But I don't see why acid would be more likely to cause flashbacks than shrooms. So opinions (from experience) on that would be helpful, as would encouraging or discouraging flashback stories.
I wouldn't really worry about flash backs. I have only had like 2 flash backs that lasted for a min or two. I actually enjoyed them. Flash backs are only bad if you flash back to a bad trip.
Well that's difficult to say, because not everyone agrees on the definition of a 'flashback.' What's more likely is slight residual visuals, like colors seem more intense or a white room might look a little extra colorful. This is mostly what people are trying to talk about when they talk about flashbacks. Flashbacks though, to an extremely anxious state, especially a bad trip, might include the visuals but also the anxiety. If you are interested in the topic look up HPPD, hallucinogen post-perceptual disorder.