T levels aren't really that big of a deal unless its high. Even if its at 0 and your e levels are high enough, you'll have a perfectly fine libido. I think the issue with libido lies with the fact that not many understand their bodies initially when making the switch to E and the changes that come with that sex wise are a bit of a shock. Its new territory and it takes time to adjust. Its like you're getting to know yourself all over again for the first time.