ive run th,serious,nirvana,female, and white lable.. best was from TH seeds, but i had good ones from nirvana, and female to.. the white lable was more like blue berry than gum..also im running next generations island sweet skunk, and it is very similar to my bubble gum, it has the smell of hubba bubba but less crystals than the bg and takes longer to finish..i was lucky to get a killer male from my serious seeds batch and crossed it with the best of each gum strain..im now back crossing to stabilize the serious male with a TH seeds female gum,, it is better than all the b gums i ordered,also made S1's of all the best females..if you want the best gum ever,,buy a pack of serious,TH, and female,,they are all stabilized hybrids...plant them all and cross your favorites to get the traits your after as everyone has different tastes, tall,short, etc...i like the short stocky indica dominant from TH but the stretch of the serious gum so i found crossing them and planting the F1's to find it all in one then bx3 it to get stability... anyways cross the stabil lines to get F1'S then find best male n female and start back crossing,,in the end you will have the best bubble gum and you can say you made it...