The fact that you didn't get the visuals you wanted on 7g. dry is unusual but not unheard of. first of all cubies (if thats what you ate) don't give great visuals, amantia give better visuals or cyans although I don't know from personal expirence. There are some folks at the nook that eat 10 -14g. dry (i can't even imagine) personally 3-4g does it for me but I grow my own so I know what I'm getting. As for why you didn't get off very well the possible reasons are endless. If they were old, or if they were not properly stored, or if they were not properly dried. However if your friend got off good on 3g. it may just be that you have a greater tolerence.