well i don't have any personal growing experience with afghan. but i have quite a lot of experience with smoking landrace indicas. i am from russia and we used to get lots of landrace schwag from post soviet republic (uzbeki, tajiki, kyrgyz etc) as well as afghani. it was prior the onset of indoor growing, i didn't know how lucky i was. at the time i was just an average uneducated smoker, thinking that all weed is like that. didn't know sativa exist even. anyway, 2 most memorable varieties were "afghani" and "uzbeki". i don't know whether they were actually afghani and uzbeki, but we used to believe this dealer.
"afghani" was the most lethargic weed i ve ever tried. 5 minutes after consumption and all talks stopped. it was couchlocking to the point of being actually incapacitating. even small involuntary movements ceased. time seems to stop and you go on a inner trip. after an hour or so you sort of nod out, i wouldn't call this " sleep" as you still were under the influence, it was more like a final phase from where from yet after another hour you slip into proper slumber. i didn't quite like it as it was a party killer and sort of emotionless, very tranquil.
"uzbeki" was my favourite. it was very euphoric, great humor enhancer and just overall "enhancer". simple food turned into fabulous feast, extreme munchies, dry mouth, red eyes and lots of laughs. music became out of this world, i remember loosing all sense of reality listening to supermodified of amon tobin and prince blimey of red snapper, among many other things. it was sort of dreamy, you began to see beauty in all simple details in life. just looking into some random picture could draw you into some other place and time. it had heavy bodystone, but not to the point of being nonfunctional like "afghani". time seemed to slow down. after an hour or so you normally crash and become very drowsy and tired. sort of pleasantly though, like after a hot bath and massage session, tieing shoelaces was an ordeal. it has smallest seeds i've ever seen. both varieties affected short term memory badly.