I don't really like to be angry or sad. While I admit I had moments in which I accepted the anger gladly, I wouldn't want anger or sadness to be something like a permanent state. You can channel your strong feeling and use them to achieve something. These feelings can be both positive or negative. Positive feelings will always lead to the right results, I believe. And the negative - you know that vengeance never leads to anything good.
I hate being sad, because... well because I don't feel good then. When I'm sad I start thinking of some of the things I'm not happy with in my life and who would want that. Self loathing is the worst possible action in such moments - but this is another topic.
But reading what you say - I don't believe you actually like to be angry, it sounds more like you just have a fighting spirit and lots of energy you need to channel into something.
And there's something else - there are the anger, sadness, happiness, fear and other feelings you feel when you watch a good movie or play a good computer game, or read a good book. Those feelings, that aren't really mine, I adore them! Because this way I feel part of the story.
But if I could choose I would gladly be happy, happy, happy, happy all day long!