I think a couple of crews would be fun. There can be bickering between them, but Pirates will only have 1 board for their ships, so you might need to put at the top of your post which ship you are on.
I'm just working on the Lost Boys board at the minute. I'm hoping to get some "new" boys to do the initiation.
There will be some info on each board for your faction. I.e. The Pirates have noticed that sometimes their some of their crew randomly disappear. I want to give you a bit of background as to what's been happening, but I'd like to leave most to you.
It's then upto you if you want to be a Captain with NPC's or if you want to join someone else's crew.
I'm just creating the FACTION boards. Other people can "invade" your boards/teritory (your faction boards) but this is mainly for your characters. See the character board on the main board to find the link to your faction.