The vicarious-love question is a good one. Personally I've found that Due South makes really good vids, to the extent that I will seek out Due South vids despite never to my knowledge having seen a whole episode of the show. My particular favourites there are "Zebra" by shalott and "Goody Two Shoes" by laurashapiro and Pipsqueak.

Stargate is another one of my vicarious fandoms, but somehow I find that the fanfics speak to me more than the vids do. Odd, that. I did quite enjoy "This is how it was," though.