There is no single answer to this question, since everyone is different, and different compounds will lead to different reactions. In most of the cases testosterone will regulate your mood in a good way. However, things like trenbolone can get someone more aggressive, especially if that person already has an aggressive mindset. So it is quite different for everyone. In addition to that, some people will get lethargic. In any case, the changes are not drastic, and they are temporary, so there is no need to be concerned about that.