For your next question it would correctly be wishing you unless you were to write I wish you.
I personally would not say that about wanting to celebrity to reply a bit extra for you. If you wanted more of a response perhaps you could write a questionnaire for him to answer? Of course he may not fill out the questionnaire but you could give it ago. Therefore in the body of your letter instead of writing about wanting a reply you could ask if he would fill out the questionnaire for you.
Ok so on to your letter
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The first paragraph - I think this is still a little bit too long. Although it is getting to be a lot better. One thing that does strike me as a little strange is your comment at the end of it being 'all shane' this comes across as quite odd and perhaps could be removed. In the sentence were you say 'as long as a new film comes out' the word can which you have used should actually be can't or cannot. As I presume you mean that you cannot wait to see new films when they come out whereas what you are currently saying is that you are able to wait which seems a little strange.
On the subject of your interests I still think you need to compress it a little because it still seems a bit to much.
If I were to write it myself it would be something like
My name is Shane and I am from Taiwan. I am a 19 year old sophmore at Chung Yuan Christian University where I major in Finance. I enjoy learning English as well but I still chose to study Finance. I have many different interests including surfing the internet and listening to music. I also spend a lot of my free time exercising. I especially enjoy soccer which I have read you are a fan of. However, I find it very difficult to find a football field but I enjoy watching the game. I am also a film freak and when new films come out I cannot wait to see them as long as it is the type of film I enjoy such as Transformers. My favourite film types are action and science fiction.
The second paragraph itself is very good although there are a few things that I would change. I still don't quite understand why you need to mention that he is super tall. Of course I am not really familiar with the actor but he is probably of average male height. I don't think I would use the term super tall unless he was well over sort of 6'7. To me it seems a little strange to mention height at all. There are a few grammatical errors such as in the sentence "I have to say it’s my pleasure to write a letter to you because you are a Captain Lennox!" you do not really need the a before captain lennox. Also the sentence "I think no other actors can do any better than you did and Transformers would not be complete without you – Captain Lennox!" reads a little strangely to me. I personally would write this in the following way - I do not think another actor could play Captain Lennox better than you did and that without you Transformers would not be complete".
In the third paragraph I don't think you really need the haha at the end of it.
Your letter is getting to be really good though
Please remember though that everything I have written is my opinion though and obviously others may not feel that a letter should be written in that way. In addition to this because you are not writing in your mother tongue I'm sure the reader would take this in to account when reading and that they would not expect you to be writing perfect english. Quite honestly I would hope they did not expect perfect english of anyone because I know I fall very short of the mark.
