Many apologies about my late reply I sort of thought no one would actually read my introduction essay...so thanks for the welcome

I would also like to answer this very well worded question:

So it would seem that the phrase "bad trip" could mean different things to different people depending upon their particular stage of development..so I can't be certain what a "bad trip" means for you personally but I can tell you what it means for me....

I take psychedelics specifically for the purpose of interacting with spirits, more specifically angelic beings.  Unfortunately there is no way to communicate with "higher" forces without coming across "lower" forces in the process..These "lower" or demonic forces continually and persistently seek to interfere with my psychedelic travels with sometimes nightmarish results. 

So I would attribute most of the really "bad trips" I have had to Demonic attack...

On other substances such as LSD, Mushrooms and Mescaline demonic attack became a commonplace problem myself and my tripping associates had to constantly battle with.  With DMT and Ayahuasca however I find these demonic attacks to be far less frequent, although they do occur and can still be nasty. There definitely seems to be a special protection there that other substances do not provide from baneful spirits. 

So from my experience DMT trips although far more potent are less prone to inducing negative 

trips than other psychedelics.

The thing is...DMT is really can't be compared to anything else however...Some of my best DMT experiences were actually the most terrifying moments of my life as well... DMT Fear is a real wholesome, Indiana Jones, fearless explorer type fear

The first time I was taken to another dimension I was really freaking out, thinking I was dead and such..but just because it scared me that doesn't take away the magic fact of what had taken place.

The first time I came face to face with a very real E.T my heartbeat easily spiked over 150 beats per minute as a classic fight or flight response kicked in. I thought I would either scream or cry or both..but when I was gently calmed by that being.. it was all worth it...

Because of DMT I made contact and have no regrets I don't care how scary or intense it was.

Also I have to say that no amount of any psychedelics reading books on psychedelics drugs or hearing people talk about psychedelics can prepare someone for what DMT can do..

Even reading about DMT does little to prepare one for the drastic effects, because what your entering into is not an illusion of the mind...Potentially you could be very much abducted by aliens and no TV special can prepare you for that.

If you care about the truth however you might be curios

Seek and ye Shall find.