As a summer project, since I sped through the series so quickly on first viewing, I've been going back and re-watching SPN from the beginning. It's interesting because I'm finding that eps I didn't really like the first time around I'm liking somewhat better on re-watch, and I'd forgotten how truly creepy some of those early eps were. I'm also discovering every episode has something to recommend it, usually in the character development. So much of the early tidbits seem to have gotten lost among the mytharc (or the fanon), and it's been fun going back and seeing where certain catch phrases originated and such.
For example,
( did you know )That's it for now. I'm sure I'll be keeping a running tally of things I discover.