Afghan Kush, despite the Tar taste, hits very well. When I need to be able to eat or sleep or simply feel relaxed while listening to some good tunes, this kush gets the job done. I woudn't recommend in the morning tho, its better to counter balance with a Sativa type strain. A good counter is Moby Dick, which is what I have right now. A dual chamber vape with 3G of Afghan Kush and 3G Moby Dick, a perfect combo for waking up and going about my day but also good for munchies and sleeping.
I feel like Afghan does help with my anxieties. And it also helps with my lack of appetite.
Cannot say much about pain relief.