JWH-073 I didn't know the dose I was doing as I smoked it in a blend, I enjoyed it but at the dose I did it was very anxious and paranoid, felt like some strong weed. JWH-081 feels slightly different from weed, but not in a good or bad way, just different, and I enjoy it at both high and low doses, but just like weed, the higher the better, there isn't as much anxiety as -073.
Haven't tried 018, 019, 200, 210, 250 etc yet.