Oh , and it asks for a serial number , but that ' s optional . Mine obviously hasn ' t come in the mail yet and I was still able to activate the code without it . <| sep |> Is there a particular flavor you ' re very fond off ? Not in vaping , just in general . For me , it ' s mint . I love minty stuff . I love mint in everything and I can never get sick of it . All my ADV are mintymenthol stuff . I recently got into DIY and I thought the first mix was gonna suck , but I mixed some lime with a good percentage of mint and menthol and it was one of the best vapes I ' ve ever had , on day 1 , right after mixing and shaking , microbubbles all over the place . And I ' m using a dusty Ego One to taste it . It is now steeping in the hopes of getting some of the missing throat hit . My point is , look for a flavor that you absolutely love , and put it into a mix of your own , and add something to make it a little better for example , I added the lime so that it would come off as a slightly sweet mint with a menthol finisher , and it did ! . And most importantly , do it with love . Because things made with love are always better no , I am not Oprah , shut up . Maybe vaping something like that can cure your tongue and you can enjoy other flavors later .