Aww, thanks for all the comments folks

I'm under no illusions that I've been incredibly lucky so far. And the story continues, not with family this time - although it might as well be:
I finally told my other housemate last night - and his reaction got me wishing I'd told him first.
His response was nothing short of amazing. Admitted to it being "a bit of a shock" which is understandable, although shortly after he asked what my new name would be. Just like Dad, when I told him he started using it straight away. He also asked how long I've felt like this, about the appointment I'd have at the end of April, what other support do I have, and was even giving a bit of advice. He reckons I should wait 'til I've had the psych. appointment before going FT, just in case I don't get referred to the GIC. Assured me it was only another four weeks, which in a sense is true - may even take me that long to get to that point, who knows. But it's something to think about.
An interesting point to note here is, all three of us are Christian (so's Dad, in fact), but both other housemate and Dad kept God out of the discussion, as opposed to speaking for Him, which is just awesome