Out of the options, I've used Hawaiian Baby Woodrose, LSD, 2C-E, DXM, Ketamine, Nitrous, MDMA and MDA (I don't count the last two as psychedelics though). I'm surprised marijuana isn't up there in the options, a lot of people do find it psychedelic.
LSD is my favorite. It truly does open up my mind and allow me to do things that aren't possible otherwise, and it makes me a child again which I love. Even when I have difficult experiences they are worthwhile.
LSA used to be good, but now it just makes me uncomfortable. I can't stand the bodyload with it either.
2C-E would be second to LSD; the visuals are just amazing and it feels like my body is being purged with psychedelic goodness. Music is fantastic on this substance as well, and Ethyl shows me all the places of my mind in strange ways which I like.
Ketamine I've only used twice so far, in the last week as well, but it was a lot of fun and K-Holing is great.
DXM was shit. Enough said.
Nitrous is cool, but I can never remember the things that I realize on it. Also, it can be a bummer when I'm tripping with other people and they become greedy for the nitrous and just want it all for themselves, so I try not to have any when I'm tripping with others now.
MDMA is a lot of fun as well, but I don't see it as a true psychedelic; it doesn't open your mind, rather it forces you to feel emotions and connections.
MDA I guess is psychedelic, I haven't experienced much of it though so I can't really comment on that but it was fun.