I took T for 6 years until 2 months ago. I'm not FtM but thought I was... for quite a while. I'm a detransitioning woman but have reconciled with my changes from T.
I was on gel for the first year, then switched to shots for the next 5 years.
Body hair wise I was a little bit hairier than what might be considered average for a woman, as I had a little bit of a happy trail on my stomach and quite hefty, dark peach fuzz as sideburns. Also I'm a naturally dark brunette with very light skintone, so my hairs show very well on me.
During the first 2 years or so on T my legs got a lot hairier and my happy trail got very thick and dark. I still had very little facial hair except from darker peach fuzz sideburns and a few hairs under my chin, at that point. My hairiness seemed to increase upwards, from feet to head. I noticed my first few chest hairs. My already very thick eyebrows thickened even more. And keeping them separated at my nose bridge became part of my grooming routine. I'm not a fan of a monobrow, but apparently my genes + T are.
At around 3 years my pubes had connected to an equal amount of hair on my stomach, which was no more just a trail. I still can't quite tell where my stomach hairs end and where my pubes begin. At that point I could grow a quite decent, styled beard. My goatee, jawline and sideburns grew in thick and dark, as well as the beard area under my chin. Cheeks and mustache were still pretty much hairless though.
At 4 years my legs were very hairy but not extreme, and my stomach carpet had connected to my chest hair which almost connected to my beard. Chest hair never got to a very wild point and the hairs there remained softer and thinner. I'd say the hair amount there is "light to moderate" if going by male standards/averages. Most of it's at the centre, a few strands around my nipples and some odd tufts right above my top surgery scars (where my nipples used to be). It looks a little disorderly on the lower half of my chest.
I could finally grow a decent full beard. Shaving started getting difficult in some areas where the hair was very thick, combined with the annoyance of acne. So I saved out a beard, cut it in a ducktail style, dyed it black and damn, it looked good. It was fully connected everywhere except front of my chin, it wasn't patchy but faded thinner upwards on my cheeks. These days I usually keep it in a stubble or shaven. Pondering on trying out a van dyke style though. I dunno I just miss having something to stroke.
At 5 years on T not much had changed. My beard had filled in ever so slightly on the thinner areas, my chest got a few more extra hairs, and I got a few single strands here and there on my back and shoulders. Changes in general came in very slowly and barely at all after 4 years. At 6 years I've more occasional hairs on my back, but as I've gone off T now and am also taking T-blockers, I've instead been starting to notice a reduction in my hairiness, starting on my legs.
My arm hairs never got very intense, but my lower arms do have a thin and fine coat of very dark brown, kinda long hairs. Their thinness makes them not very apparent. They trail down on my hands and I've quite some fluff on the knuckles of my fingers as well, which is much more apparent, however I had that before I started hrt but it got a little more of it. I've a brown dot on my left wrist with 2 barely thicker hairs growing from it, but before I started T those 2 hairs were noticably thicker and darker in comparison to the surrounding ones. So that's how I know there's been some change in my arm/hand/finger hair, but not a lot.
As for my head hair what I know for sure that the T caused was my very obvious change in hairline. I've seen on my relatives (especially my uncles) that high temples but otherwise full head of hair, appeared to be what was in store for me. Fair enough, I guess. My temples receeded a couple of inches, then stopped.
However my hair also started getting very thinned out and brittle, at around 2 years on T. Like it got evenly thinner and more brittle all over, and not in a male pattern baldness kind of way. If anything, my googling tells me that might be a sign of female pattern baldness, which honestly just confuses me even more. 4 years later my hair was barely a quarter of what it once used to be, cause it had broken off a lot, but my hairline was the same. Past tense on that cause I got it shaved off couple of weeks ago, so I don't need to worry about it for now. I'll likely try to grow it out again at some point and see what comes out of it, but for now I actually really like the bald look. I think it looks good on both men and women. On myself, I prefer the look with lots of makeup, sometimes a bit of stubble, lots of jewellery and fem goth clothes. I'm also meaning to experiment with scarves, transparent veils and head jewellery. I was worried about that I would regret getting my head shaved, but it sparked my creativity instead!
But anyhow, I think there's at least a chance my head hair can come back to life again by me just giving it time whenever I'll grow it out again, also considering I stopped taking T, my hairline won't be going anywhere it hasn't already. But I also don't actually know if it was the hormones that caused the issues with my head hair, it's just one of many theories I have. But as I said I have reconciled with my changes and yeah, I'm one hairy girl now. But my worst issue with that is... all the damn itchiness! I trim down my leg hairs and shave my stomach for that reason, cause if there's anything I can say I hate with passion, it's itchiness. I even seem to prefer pain over it. So I need to deal with that by keeping those particular areas trimmed down and apply lots and lots of moisturisers. I know for me it is the hairiness combined with dry skin and sensitivity towards stretchy fabrics (as in waist band on underwear, elastic leggings/pants and the elastics in socks) that causes the itching, so that's why I thought I'd mention it. But now I've ranted enough and I'm finally tired enough to sleep, at 5:40am. So, bedtime.
@cattywumpus I also got toe hair. I think they're kinda cute and matching my finger hairs, but maybe that's just me? Also I worried more about the shape of my head when I was about to get mine shaved. Turned out I had no reasons to worry at all cause my head is like a perfect shape! But I have a mysterious thing, something like a C-shaped narrow dent on just one side of my head. I can't stop poking it, just wondering what it is! Is it a scar? Did my parents drop me on my head as a baby? Who knows