I would love to see something tie dyed!! Like maybe a black shirt with a big psychdelic pot leaf? Maybe even a funny qoute or something like "real stoner's wear tie-dye"? Just a thought.
As far as seed personalities. I would think that a Purple Haze seed would look like jimi hendrix. You know, full afro with a purple head-band (with acid in it) lol....maybe a little guitar around the seeds "shoulder". I think it would be cute ^_^
Also, i think size is very important. I wll say it, i'm a fat kid lolz. Because I love rollitup so much I really would not care to have to pay for the extra fabric. The shirts are going to be awesome, and I would sport mine everywhere.