Gackt Camui has spent time learning languages, such as Japanese, English, French, Mandarin Chinese, Korean, Cantonese and I read once Italian too. This past 12.05, the Diabolos Tour took him to Korea where he did it in it's entirety in Korean. He knows how to do martial arts such as karate, judo, along with boxing, and billiards. He is multi-talented in his music, and not just in his beautiful sounding voice.
Gackt started to learn piano at 3 year old, he learned the trumpet from his father, and since the movement was basically the same for all brass instruments, and Gackt's fingers had been disciplined on the piano he found after learning the trumpet he could play all brass instruments. When he was in ninth grade, he started to learned how to play the drums. With all that I have previously said, he composes and writes his music too.
He intrigued me at first, because I saw a video of him(blond)singing Mizerableon youtube (url keeps changing)and he looked like TIDUS. OMGoodness I couldn't believe it. I loved playing Final Fantasy X and I loved how the game brought you along emotionally between the players. Therefore, when I saw Gackt (looking like Tidus) singing with that beautiful voice I looked up all sorts of things about him for 3 solid days. That is how much the video affected me. Now I have his movie, all but one of his CD's and all of his concerts on DVD.
He does many things so well, and better yet, his achievements don't seem to go to his head; at the same time doesn't take himself seriously when there is fun to be had. He has a wonderful sense of humor with great wit.
The further he gets from his Malice Mizer days (98') the better and cooler he gets. I think what you see now is who he really is. With his own band, he can truly show his vision.
Final Fantasy and other games with his likeness is that he had the look first. It isn't as if he saw a game and said, "Hey I am going to look like that." You can tell by the dates of him and when the game has/had come out that Tetsuya Nomura (in charge of clothing and character design) looked at him for ideas, they know each other you see. I think in the beginning of Final Fantasy X-2 Yuna sways like him when singing; too far a stretch, maybe.
A final thought, I do not know all about Gackt, but I did see some people that have written negatively here, and my impression is that they know less than I do. He is a beautiful looking man with strong male features but maybe not strong enough for some male egos; just a guess. How can they not be impressed with his talent?