I'm sick of seeing Astrodome teams. I ran a series of 6 or 7, and all except one made the playoffs. One team won 121 games.
Now I've moved on, but WIS leagues are infested with Astrodome teams. They're easy to build, if you know what you're doing. The stadium lends itself to certain strategies more than most others, even Petco.
I'm also tired of facing Greg Maddux and Pedro Martinez in every other game.
So, I'm looking to field fewer and fewer teams, and limit my play to leagues with real drafts and exclusive players, and limits on stadium usage (especially ones that rule out the Asstrodome).