Can There Be an Overfocus on Grammar?

It's overwhelming today as a language learner.  There's a lot available, and that's wonderful,  

but it's also overwhelming. But can you tell me  then with everything available now today, what are  

some of the common mistakes that language learners  face? What kind of problems tend to be common as  

they create their studies? In Japan, I think we  teachers still use the grammar translation method,  

so you know, that's different from just  teaching grammar. It's sort of a method that,  

as I understand it, doesn't have any research to  support it, and doesn't have any theory behind  

it. That's different from teaching grammar the  good way, like you do. Thank you. Some people  

are very gifted at teaching grammar, and I'm in  awe of people like you who can teach grammar in  

a very interesting and very intelligent way.  And you have a really powerful grasp of it.