I don't know about a habit... I'd do it again, but I'd imagine as more of special occasions thing, due largely to my inability to do much of anything while in the throes of it's influence.
Now that I'm pretty much down, my reactions:
It wreaked havoc on my sense of time. It seemed as though years were passing, while at the same time no time was passing at all.
It gave me slight cotton mouth for some reason. I was drinking diet code red mountain dews, which I'm sure only made it worse.
I felt three distict stages of the trip, although the last may have been a regression to the first. It's hard to tell. I was able to converse fairly coherently throughout, both on the computer and to people in the room. I did experience some mild disassociative affects.