I would be happy if BT implemented the option for SDSL, the 6 megabit download speed I have is adequate for my current needs (local exchange only has adsl max), but the 0.3 megabit upload absolutely sucks.
If it were possible I would gladly pay for a symmetrical (3 megabit up / 3 megabit down) connection.
Connections (like so many other things these days) are geared towards consuming content but gives little allowance for anyone trying to produce content, therefore I can currently download cat videos at 20 times the speed I could possibly upload them