Do you like Nathan Fillion, rugged-yet-sensitive-Canadian-acting-person, of Firefly, Castle, Buffy the Vampire Slayer, Dr. Horrible, and Waitress fame? Do you like to laugh? Are you, maybe — just maybe — a wee bit of a geek? Of course you do, of course you do, and of course you are! That being the case, you will understand why the following made me so happy. I give to you: Nathan Fillion guesting on a web series starring his friends (I think! I don’t know what it’s like to be …