First starting out I would order a bunch of singles so I could figure out what flavors there were and which ones to pursue. I had never experienced a real OG, diesel, grape etc. Maybe that would not apply to people who have access to dispensaries but a good approach for those of us who have only ever had commercial kind.
Once you zero in on the flavors that interest you, then you can run a pack or two of that variety to try and find a standout with that flavor. The best thing you could have if a handful of those unique flavors that you can rotate and mix.
The first OG I came across that has the cologne was Reserva Privada OG18 and I was impressed how that flavor stayed in the jar for months. Since then I have run dozens of OGs and the best I have come across was Rare Dankness Lee Roy OG. The chem was Divine Genetics GSC X Chem D fem. The best sour D was TH Seeds Sage n Sour fem. Cali Connection Alien OG fems were very good, a hashy skunk frosty bunch. Reserva Privada Sour Kush was very good as well as Skywalker OG.
Lots of other very unique flavors to search out. Just came across some amazingly citrus Sin City - Tangerine Power. From a 6 pack of fems, 4 citrusy/dunkin donuts smelling ladies and 2 had low smell but plenty of frosting. 5 of 6 were very frosty. 3 had amazing flavor with 2 that really standout, 2 of which yielded decent also.