So, I've recently started T (the 26th of October will be my third injection), and while I haven't noticed many changes yet, there have been a few surprising ones.
1. I gave my roommate beard burn on her shoulder. I was snuggled up because I was sleepy, and laying my face on her shoulder (she was wearing a tank top). I suddenly had to cough, and I didn't want to do it right into her face. I moved my face quickly, only to have her hiss at me. When I pulled away there were several red lines appearing. I had just scraped her bad, and while I've always had sideburns and the beginnings of a goatee, what I scraped her with was jaw line hair on the side. Whoops!

2. Hunger. I am suddenly always hungry it seems. I've taken to eating about 3-4 apples a day as snacks, or fruit leather (apple puree, pear puree, and whatever flavor the main fruit is puree... pressed into a fruit strip), or walnuts. Before I started T, when I got hungry I could shrug it off for a couple hours, now though... now it seems like I'm noshing something every 2 hours or so, and when I get to actual meals, I'm one bite in and full. That's the big thing, before T I'd be able to eat and eat and eat, now I eat [an apple], and I'm set.
Those are two of the most surprising changes as of yet. When you started T did anything happen, or did you notice anything about yourself that you didn't expect, or was funny?