If I could rewind time I would have started out looking for a good OG or Chem right off the bat. Out of 118 females tested for potency and flavor here are the best keepers I have come across.
TGA Qleaner (frosty grape lemony fuel potent)
TGA Ace of Spades (purple calyxs fast sweet potent)
Reserva Privada Kandy Kush
Reserva Privada OG18
Reserva Privada Skywalker
Reserva Privada Sour Kush
All the RP stuff tastes similar and is supposedly based on the Chem 91 cut. Once you have grown a handful of RP OG beans you will save yourself years of growing mediocre trees as I wish I had. There are plenty of other awesome varieties out there it is a never ending search. A true Chemdawg should smell disgusting (sour cheesy?) + fuel skunk. The Kandy Kush is the closest thing I have come across to the real thing, disgusting in a good way. The OG has a peppery (green peppers) fuel skunk.
TGA is great if you want to mix it up and get some frosty flavorful nugs. My avatar pic is Chernobyl. Everyone I have shared with consistently loved the purple Ace of Spades which surprised me because people don't usually like the same thing over and over.