Well, after some initial hiccups with my starter (the first started smelling like nail polish remover, so after some extra feeding with no changes, I canned it and started again), I baked my first loaf this morning.
It was something of a revelation.
In fact, I just looked at it for about 15 minutes, slightly bewildered that I'd managed to produce something of a standard I'd be happy to pay for. I've baked a few loaves in the past, but nothing sourdough, and with varying degrees of disappointment. So with some help from people here (and suggestions of a first loaf - this one is the Norwich Sourdough from the nice lady at Wild Yeast), here it is. I couldn't be more pleased, to be honest. Thanks so much to all who took the time to answer my questions. I feel the first pangs of addiction.