3 books to read:
"The Teachings of Don Juan" and "A Seperate Reality" by Carlos Castaneda, about mesoamerican/"mexican" shamanism and "DMT: The Spirit Molecule" by Rick Strassman, about DMT research. I'm sure a lot of you have read at least one of these books. In his research, Strassman records a TON of information about the viuals/experience of a DMT trip. The trip reports range from spiritual feeling to alien, so IMO i don't think any specific feel of a trip can be expected (this is kind of obvious for any hallucinogen), even if you've had many similar trips, your next might be completely different.