In reply to Climbing Pieman:
I got one thing right with our new bathroom, one thing wrong and didn't have the funds for something I wanted.
Right - I fitted a "mechanical ventilation heat recovery" fan - this dumps humid, moist air outside whilst keeping the heat inside by having bi-directional flow through a counter-current heat exchanger. It's great. You set the humidity you want and it only ticks over below that. No need for a heated mirror with one of these, and you're not blowing your heated air out of the house.
Wrong - shower - we only use it occasionally. It's got some infernal trap that isn't a U-bend, and it only needs about 3mm of water to evaporate form it to allow stench out of the pipe and into the room. One to watch out for.
No money - I wanted to fit a counter-current heat exchanger to the electric shower (the Recoh-vert -
http://shower-save.com/products/recoh-vert.html ) - not to save energy but to get a lot more hot water coming out.
Other random thoughts; we visited a big stone warehouse about 40 miles away and got a great deal on some odds and sods of marble that really made the shower. Bath, shower and crapper came from an online bath retailer, seemed much cheaper and higher quality than high street outlets. Try and find a space for a decent wooden chair - surprisingly useful. Don't forget to think about laundry bins etc.
Edit: We renovated our house from scratch. The only rooms I did plans for "on paper" were the bathroom and kitchen. Spent some time drawing bathroom possibilities on graph paper. Get other people to look at them incase you've done anything dumb (like me).
Post edited at 23:28