Gliese 581
Your average civ junkie
I really don't like how infrequently Free Colonists appear in the immigration pool. In the original game, they appeared often. I love Free Colonists because you can get the natives to train them.
Can't you clear their specialty in col2? If so, it would never ever be better to get a free colonist over a specialist. They are of course much better than criminals and indentured servants.