I was in the same position as you mate, and asked the same question. What I was told made perfect sense when I thought about it, so I'll try to summarise.
I bet when you first started testosterone replacement therapy (TRT), you felt great - on top of the world, sex drive of 10 rabbits, etc? And then it kind of "tailed off" to just feeling kind of good, but mainly normal most of the time? I was the same, and it seemed logical to me that I should push my levels higher to try and get this initial rush of awesomeness back again.
If you up your dose, you will might regain some of the great initial benefits - but once again they would tail off, leaving you now at a much higher total level of T, but still essentially feeling the same as before. Where do you go from here - higher again?
Running at supraphysiogical doses of T for prolonged periods of time (above the top of your lab's reference range) is associated with health risks - hematocrit, hypertrophy of the heart, adrenal fatigue - amongst others. You'd be increasing your risk of adverse effects, for only a temporary boost in how "optimal" you feel.
What are you actually after specifically? More muscle? Better sex drive? The former can be addressed by doing a 12 week "blast" on a higher level of T before returning to your baseline dose, the latter can be remedied with Cialis. Either is a better option than running at an above normal T level for the rest of your life.
