I'm just annoyed when I check out a com and discover nobody's posting anymore. I don't really have the time to do exchanges, but non-porn centered multi-fandom comms that are active would be potentials for me (can't promise how active I'd be, though).

The Honorverse (the fan name for the Honor Harrington series, by David Weber, which you can get for free mostly, from Baen) is sorta the Napoleonic Wars, set in space, with plenty of space comabt.