I did read all 5 books of "A Song of Ice and Fire" (more popular as "A Game of Thrones" right now) without much of a problem, so I am quite confident in understanding written English, however I have a lot of trouble with heavy dialects, like Texan for example. That's not limited to English though, even for Bavarian I need these few extra seconds to understand what was actually said - pretty awkward in conversations.
Another problem for me is formulating decent English sentences. While I do eventually get there, it just takes too much time for me to do it on-the-fly, but atleast my pronounciation always has been praised in school/by native English speakers, my accent should be quite subtle.