This isn't a top favourite, it's just showing off your animes you've finished, watching, completed ect. To other people, you can also make a manga list and a recommendation for different mangas and animes.

1. Go here. http://myanimelist.net/panel.php
2. Make a account, it won't take long at all! =P
3. Type up the anime you finished or currentley watching through the search bar, and add them to your list.
3x. You can go to your empty anime list, and click add anime. Theres also a search bar in the popup, this way is much quicker and efficent.
4. Make recommendations to other people! =D
4x. This quite optional, and I don't really recommend it. Make reveiws, and post on the forums. :p
5. Search around for anime you like, I found really good anime through this like Elfen Lied and True Tears!

Here you can talk about ANY anime, including One Piece. So any anime here.

Here's my animelist! :3
http://myanimelist.net/animelist/Williampetty