I agree, this is the kind of topic I love to learn from. I would add that sometimes paceline etiquette seems to vary depending on cyclists in your area or the type of group you're riding with on a given day. When I started road cycling, I was told that it's bad form to pull off right in front of a hill. At the same time, you don't want to slow the pace too much, either. So my strategy is to try to time my pulls (on a known route anyway) where I know I can maintain the group's pace, and hopefully not be in front on a really steep hill. I, too, am often the only woman in my groups. We have some strong hammerheads who often stay at the front for miles, but I figure I'm OK if I can contribute shorter pulls according to terrain and how I'm feeling. Better than sitting in and never working.