Honestly, I think it's just a fad, just because Wiz Khalifa says its his favorite smoke, everyone all of a sudden thinks it's the best weed in the world. To me, there's nothing remarkable about the flavor or the aroma to make me want to smoke godly amounts of it. Like I said, it's decent/good, but not amazing. Some of this might have to do with the market being flooded with mediocre OG Kush made by growers in their mom's house closets. Give me some nice frosty BC Blueberry or Hawaiian Haze over that any day, something with some more intricacy or structure to the flavor. OG 18 has always just seemed like it's very straightforward and not complex enough for me. It's the same tangy-woody flavor on the uptake, on the tongue, in the nose, and coming out. The one good thing that I think it excels at is anorexia, it's always made me ravenous, and also good for pain relief. OG 18 is the kind of thing I would smoke when I was at the end of a party to come down on, but not an every day kind of thing.
I'm biased towards God Bud, because when I light up, I like to get complete annihilated, and as I say, I prefer Indica. The 18% THC of your average OG 18 doesn't stack up to a high end God Bud's 25-28%. I just feel like it's like having the choice between a cheese pizza and a pepperoni pizza that are the same price. Why not go for the one that has the extra stuff (pepperoni) on top?