I definitely recommend watching this masterpiece. It was my first anime, when I started watching 2 years ago.
But for some reason I dropped it and recently got back and rewatched it.
This show is so fascinating and overflowing with mixed emotions that you will be confused with yourself about which charcter you like more.
The show's name is Death Note.
Truly a perfection.
I liked everything about it, the plot, characters, even the sound (but I didnt really like one of the opening's song...).
I'll give it 9.5 and not 10 just because of what I said above.
I would definitely recommend for you to watch it asap.