Being humans, we have emotions, so of course those include anger. We should always try to be as positive as we can, just because it's all around better for us - health-wise, and mentally. If you are generally in good spirits with a high vibe, then I would think you're fine. I don't believe suppressing emotions in order to manifest is a good way to go, but deal with them as they come and then let it go. If you're anything like me, you stew on certain situations, and that is where it can affect your manifesting imho. It's a matter of being aware of what you're thinking and putting out into the universe. Sorry for rambling...hope I answered your question.
