Have you gotten your levels checked?
There are plenty of other reasons you could feel this way, but it is important that you know your levels before saying, "oh, this is just the type of person I am...no big deal". The goal of HRT is to have your levels be in the range of normal male levels as taking testosterone will override the female levels of estrogen in your body. If you are a young adult male, an acceptable range would be around 600-1000 total. If you are not in that age range, between 450-800 total probably be okay. However, some men claim they aren't even capable of functioning normally (such as developing abnormal sleep patterns, losing ability to become "aroused", becoming moody, feeling lethargic, lack of motivation to do things they enjoy, etc...) losing in if their levels are lower than 500; if your body is dominated by testosterone and you're not even sure if your levels are 400 total, this may be the problem. If you are on a low dosage (and hopefully you know this dosage cannot be publicly discussed on the forums) or at least a dosage that is lower than your body needs, it's important that you have this addressed, esp if you have been on testosterone for a few months now.
If you know what your levels are and this is not issue then none of what I said here actually matters, but I figured it was worth mentioning just in case. >_<