Is there anything wrong with my English learning method?

I’ve just realized that I seem to have a completely different way of learning English from most of my classmates. My classmates do a variety of exercises. They browse the library for textbooks and exercise books. Some of them even go to language centers. In short, they focus strongly on the exercises. The situation is quite different to me. Of course I do exercises, but I don’t frequently search for books like them. I often buy some exercise books and stick to them until I’ve done all the exercises. I don’t do exercises as frequently as them, as doing exercises for a while is too boring for my taste. I spend my time more on English fictions, comics and websites (and adventure games, which require a lot of ready and/or listening), and I always keep a notebook and my old Oxford dictionary in case I need to write any new words. So far, I’ve received some positive comments from some Flutherians about my English (a big thanks for anyone who appreciate my English :), but I feel as if there’s something wrong with my learning method. While my classmates do exercises I seem to be playing around. Am I too lazy? Is there anything wrong with my current learning method?