For myself, I'd say every company has a dog or two they should have kept on a chain short enough to keep it from sitting on a hobby shop shelf.
The first thing to say about Eastern European kits is that whatever the subject, whoever makes it, you need to have three things going for you in the modeling department: patience (most require considerable dry fitting and most don't have any parts alignment devices), resourcefulness (as a general rule most are no frills affairs that may see you needing to dig through your spares box), experience (from what I've seen so far, no Eastern European kit could be classified as a beginer's kit, many are of very high quality but it takes experiennced hands to get them looking really good).
Notable companies from Eastern Europe:
Bilek (Czech Republic), Eduard (Czech Republic), PST (Belarus), ICM (Ukraine), KP (Czech Republic), Pavla (Czech Republic).... Thats just to name a few.
I'd say if you've never done an Eastern made kit before and want to give it a go, the Czechs lead the way. The modeling hobby is very strong there and many kits are at or near Western standards straight from the box.
As for Western manufacturers, Revell Monogram is good, Revell Germany is another good one but their best kits are a trick to find in North America. I swore off AMT years ago as much from poor customer service as anything else. Testors and Italeri can be good, but you have to be very careful when purchasing their kits, Italeri has a lot of old Esci originated kits popping up in its catalog and Testors has a lot of older kits from a variety of manufacturers, some molds more than a bit long in the tooth too.
As for Hobbycraft, they cleaned up their act a decade or so ago, they used to be very bad for pirating other companies kits, they still have a few things in their catalog that could be described as questionable, but I'd say if you're looking at one of their kits on a shelf and its less than ten years old, it probably won't be bad.
I haven't built an Asian kit in a long time, so I don't feel right commenting on current products from that part of the world.
Hope that helps