The only Friday the 13th that's worth watching is the original, IMO. I watched it the other night, feeling very nostalgic. I'd completely forgotten that Kevin Bacon was in it!
I have a lot of personal connections with the movie and the series: I used to buy pot from one of the actors when we were in high school, and I was friends with one of the kids who is sleeping in the cabin in the opening bit. Another friend directed one of the later films (same guy who is working on the new Texas Chainsaw Massacre), and while that entry sucked major balls it starred a bunch of kids that I was in drama club with. I probably would have been in it myself if I hadn't moved out of the area.