I'll put in a good word about DXM. In the 3 experiences that I have had with it; 2 were very enjoyable and enlightening, and 1 was a practically base-line 1st plateau trip. The 1st "good trip" was spent (alone, I know, bad) staring at my wall for 5 hours, seeing all sorts of colorful "fireworks" on the wall, and trying to walk to the bathroom every hour to pee. Crazy flanging under bright lights, extreme "robo-walk," the whole 9 yards. The culmination of that experience was Satan (in a good way) throwing red melted wax over my field of vision and having it run down it. (6 mg/kg)
The 2nd "good-trip" was a much more interesting trip because it involved moving around and being (relatively) active. Watched "Big Trouble In Little China" which was awesome. Went outside on a summer evening, where the sky was orange, and was just hit with the most amazing feeling of how great being outside is. When on car trips, had the greatest feeling of deja-vu I had ever had, reminding me an experience 5 years ago, when there was a fire near my house and the way the sky looked. Emotional in a very good way. Then a trip to a party with friends was nice, including tripping out a friend that had been smoking marijuana. All in all, a very magical experience. (~10mg/kg)