Coincidentally enough, I caught Ghostbusters on TV last night just flipping through, and almost at the beginning. I haven't seen it in a long time; it was even better than I remembered. Also, now that I'm in the Manhattan area I actually recognized the buildings and scenes and stuff.
Bill Murray's comedic delivery is just perfect, and there are a lot of things I didn't notice when I was younger, like the looks he would give the other two when they would say things. (Ray: "Listen! Do you smell something?" and Peter deadpan looks at him and starts pointedly sniffing.) Also, there were a number of little things I didn't pick up on as a kid, mostly sexually. Like when he goes to Dana's apartment and opens a door and she says, "That's the bedroom, but nothing ever happened in there," to which he replies, "What a crime."