LSD several times, shrooms a couple, 25i/2ci a few times and DMT only once. I have done them over a span of several years and from I can tell, depending on where you are in your life and what relationships you have, will steer your trip in a certain direction.
The people you are with make the trip as well. I think my favorite has to be LSD and my least favorite (although still enjoyable) is shrooms.
Most of the time I go outside on hallucinogens and just talk to whoever I am with. I also like going out to public places or really crowded areas. People watching, writing, drawing, reading, and even just laying down and closed eye hallucinating are all enjoyable.
If any of you plan on doing some I suggest;
Make sure you have 8 hours of free time as to not worry about anything you might do.
Leave your cell phone at home (unless you think you'll absolutely need it)
Stay away form TV or computer.
Try to do them with people you know well.
Also, only tried alcohol with 2ci once and I didn't even get a buzz after 8 beers. It was unreal.
Did molly with 25i at a Bassnectar concert and it was phenomenal.
Weed with shrooms was okay but nothing great.