I'm... not terribly in favour of random pairing. It's bad enough when applied to Fate RP's (they're hardly ever random in canon), when it's a process to match characters by compatibility, well... worst case, you match people up when nobody left can agree on anything, but may as well try to make matches that actually have some sort of interesting relationship. Plus, I don't think we'd be closing signups the instant things start, so random matching that assigns everyone immediately might be a problem.