Fairly active players (so they can keep up with progress) 10 hours a week minimum.
Farmers, crafters, miner, hunter, raider let me know what you are (or wanna be)? Protection and materials can be regularly supplied - the whole aim is to support each other with different needs.
Instead of working for 4 months on your farm and then getting robbed & murdered and having a MASSIVE cry on the forums about it - join with a group that can actually protect you, this way you can focus on what you like to do and not have to worry about murdering if that sort of thing completely disinterests you. Protection of our members is our number 1 priority.