for me it is trying to remember words (and characters) I've been learning French and German for a long time. I started Chinese in 2007. With European languages there are many words that read the same, so building up a vocabulary is much easier than with Chinese. What I think is strange, is that although I struggle to remember words in Chinese, once I do have a certain Chinese word in my head, I can remember it much quicker that the same word in French and German. I don't understand why...

pronuciation and characters

我也觉得学习汉语最难的就是汉字了。

chinese people that don't want to speak to me in chinese. 有时候 中国人不要跟我说中国他们只要说英文。。哈哈

Hello Shadow, It is definitely 汉字！