I chose no.......Not simply for the fact that I don't think the HRT would fully fix my dysphoria, (I've always wanted a penis), but because of the following reasons:
1) Even though testosterone will shrink breast tissue, and chest exercise will help to decrease further, you'll always have a little...Binding is a pain, and honestly even with a good binder it could probably cause back, lung, or rib problems later down the road.....
Plus you'd never get to go shirtless, swimming or otherwise. You can't exercise or swim in binders. (Well...you're not supposed to at least), and if you got into a committed relationship with a Cis-genders, heterosexual female, even if you were honest with her about being an FTM, what little breast you have would probably be a turn off and could hinder your relationship physically and sexually.
2) Even through the growing of facial hair, excess body hair, deepening of voice and etc occurs, and that may be enough for some people, I don't like the idea personally of only doing things half-way....I'm committed, although it will take some time. I fully indent to have a top surgery and either a metodioplasty or phalloplasty.
3) Although it is not scientifically PROVEN, it is believed that introducing testosterone into the female body can cause cancer of the cervix, and it is recommended that after a specific amount of time on HRT for FTM's a full hysterectomy is done to prevent this from happening. While I know that internal organs probably do not count compared to the sex organs, I do considering this kind of surgery to be a part of transitioning.
This is just my personal view...I don't speak for all FTM's, of course.