Hah, no worries about hard feelings, I've been posting in the SD for...oh, almost four years now, and I've been in much more heated debates.
And yes, Firefly is an excellent show, and it is a shame that it got cut short.
As for friends, perhaps, it tends to take me a while to really warm up to a person though, so I guess we'll see.
That said, you've made a good first start in the SD, keeping your posts pretty civil and defending your points reasonably well. Work on it a bit and you could become quite well respected.