Home-made is best, but I eat quite a bit of store-bought as well.
The key is to find jerky with a good blend of moisture and texture. Jerky that is too moist is basically eating semi-dried, cooked beef. Jerky that is too dry is like eating strips of rawhide. It's hard to find the right balance.
So here are my ratings for store-bought (the ones available here):
1. Pemmican brand jerky: two thumbs down. Way too much moisture. Possibly the worst store-bought jerky I've tasted.
2. Oberto: thumbs down. Slightly better than Pemmican brand, but still too much moisture.
3. Jack Links: pretty good, although a bit on the dry side. Not dry enough to make it unpalatable.
4. Blackbeard: okay, now this is good stuff (for store-bought). Good balance of moisture -- not dry enough to require you to gnaw on it, but not wet enough to lose the whole "dried beef" aspect of good jerky. Leaves a touch of fat on some strips to provide a little extra pleasure. I get my supply from
Dark Run Jerky; I am a particular fan of their
jalapeno flavor, which has crushed red pepper bits and spicy marinade.