The best bud I've smoked is OG Kush from a medical club in SoCal.
It wasn't mine, so I'm not 100% sure, but I believe it was rated at 20% THC.
While kush strains are usually a rich green, these buds were so coated in trichromes that they looked like a white strain. The buds were extraordinarily sticky; you could make finger hash after tearing up just a bowl's worth.
I've smoked it out of a bong and a vape. I actually found it more intense from a bong. It tasted delicious, slightly sweet and piny, from either.
The high was very intense; as a kush, the couchlock and body high were fantastic, but, due to the extremely high quality, it was also heady like a sativa. A couple hits will get a veteran stoner baked, and my one excessive session (basically a 'power hour' of bong hits) left me feeling almost like I was tripping.
If you live in Cali, I highly suggest trying to get your hands on some medical buds. They're ridiculous.