Just a few corrections in addition to Adriano's correction:

My favourite are Mass effect, dragon age and I think that both disonored and deus ex are amazing,  although I don't usually like "stealth" games.

My biggest favorite hobby is drawing, as (does this as means because?) I love animation and character design. I also enjoy a bit of reading and web-design. (in Englisch you do not use comma before and)

Now I'm student (you can use currently or at the moment at the beggining of this sentence or after "student"), but it is my last final year. I'm writing my graduation work Master (or Bachelor) thesis. (thesis=дипломная). 

Although I'm a little bit hesitate unsure about my english, but without practice I can't fix it. (you should use comma when you have Although)

I would be really glad if you could help me.
I understand all what people say, I can read a books (eather a book or books) in english, watch movies (a movie is grammatically ok but you making a list so it is better to use plurral)   but i've got a little, or maybe a big problem with expressing myself in english. I find it hard to describe things in proper ways. Maybe I am a little bit nervous or just unconfident. So, can i count on you? -__- I'm really tired of it. I know it may (or might) be it's sound wierd.

I wouldn't say you have problems with expressing yourself :). Just be more confident ;) 

Here I go again!

Hi! I'm coming back ^^
My name is Darina, I'm 25 years old(1988) and I'm from Saint Petersburg, Russia. I'm geek and I like video games. My favourite are Mass effect, dragon age, and, although I don't usually like "stealth" games, I think that both disonored and deus ex are amazing. Actually I don't like "stealth", but dishonored and deus is amazing. [You have great taste in videogames!]
My biggest hobby is drawing, as I love animation and character design. I also enjoy reading a bit of , and doing web-design a bit. Now I'm currently a student, but not for very much longer, since this it is my last year and I'm already writing my graduation work. 

I study english and korean and, although I'm a little hesitate unsure about my english, I know that without practice I can't improve it, so I would be really glad if you could help me.
I understand all  everything what people say, I can read a books in english, watch a movie, but I've got a little, or big, problem with expressing myself in english. I find it hard to describe things in proper ways. Maybe I'm a little nervous or unconfident. So, can i count on you? -__-  I'm really sick of it. I know that it might sound wierd.

here i go again

Hi! I'm back ^^
My name is Darina, I'm 25 years old(1988) and I'm from Saint Petersburg, Russia. I'm geek and I like video games, my favourite are Mass effect, dragon age and, althought I don't ussualy like "stealth" games, I think that both disonored and deus ex are amazing.
My biggest hobby is drawing, as I love animation and character design. I also enjoy reading, and doing web-design a bit. I'm currently a student, but not for very much longer, since this is my last year and I'm already writing my graduatinon work.
I study english and korean, although I'm a little unsure about my english, I know that without practice I can't improve it, so I would be really glad if you could help me.
I understand everything people say, I can read a books in english, watch a movie, but i've got a little, or big, problem with expressing myself in english. I find it hard to describe things in proper ways. Maybe I'm a little nervous or unconfident. So, can i count on you? -__- I'm really tired of it. I know may be it's sound wierd.