The first thing I noticed was that I felt generally more wide-awake and alert, and could get by on less sleep. Within the first month, my skin started getting oily. About two months in, my partner commented that my face was starting to look more masculine, but I don't know how much of that was T and how much was weight loss. Around three months, I had some mild acne, but since then I've been diligent about washing my face, changing pillowcases, and such, and it hasn't been a problem. I also started noticing that I had a lot more stamina.
Noticeable physical changes started happening for me between four and five months in: I have hair coming in on my chin, arms, and legs now, and I'm suddenly much stronger -- I lift weights pretty regularly, and all of a sudden I started gaining strength really fast. (Love it!) And in the past month or so my voice has
finally started to drop, and that sex drive thing has kicked in... yikes.

So it's all happening a bit more slowly than I'd like, but it is happening. Maybe it's slow because I'm older? It's not the T levels, which have been running pretty high since the get-go.