Raiden, that whole season was just plain weird.
I had been on that team the year before as a 3.0 playing up. On signing up, I told the captain I cannot attend practices (because of the location and time she chose). No problem, she said. She then played me quite a lot that year.
Then I came back the following year with a shiny new 3.5 rating and stronger tennis skills to get totally benched. I think she decided to make a run for the division title once the season started, which was downright silly given how many players playing up she had.
When she called to invite me back this year, she left a message first. The message was very nice and asked whether I had a partner I'd like to bring along with me. So maybe the problem was that she wanted to stick with established partnerships and didn't play me because I didn't come to practices and didn't know anyone last year? Eh, whatever.
Regarding your thoughts on captaining, I say go for it. As you say, it is very nice to know you will be treated well on at least one team (your own!).
As you know, my teams are "equal play" teams. If you are good enough to be on the team, you are good enough to play. With this philosophy, we have only had one losing season (went 4-8 in our first season of 6.5 combo after moving up from 5.5). We have gone to the playoffs twice despite playing everyone, so benching people is not the only way to have a competitive team.
One piece of unsolicited advice if you decide to start a new 8.0 team: Get started now. I am starting a 7.5 combo team from scratch. I decided to do it for the fall 2009 season and not wait for the winter 2010 season because it is harder to hit with people when there is snow on the ground. I have 11 committed players for September, and I started asking around in *February.* Also, if you can find a good female co-captain, that will help greatly in finding good female players.
I hope you do it. I think you'd be great at it!