It's been a long time since I've left the theater thinking that I wanted to see that movie again. That was what I felt after seeing the new Ghostbusters.
Ghostbusters did the smart thing by not going in as a remake of the original, nor as a reboot. You won't see gender-flipped versions of Venkman, Ray, Egon, and Winston. This was a good call. The Ghostbusters (Erin, Abby, Holtzmann, and Patty) are not identifiable analogues of the original characters; even though Holtzmann bears a passing resemblance to Venkmann, the resemblance is only vague and superficial, as their personalities are worlds apart.
They also made the right call by making the plot totally unlike that of the original. The three surviving original Ghostbusters all had cameos (some more substantial than others), as did Sigurney Weaver and Slimer.
The addition of Chris Hemsworth as Kevin puzzles me, as he doesn't really add to the movie aside from being gorgeous; frankly, I won't be upset if they find a new receptionist in the sequel, unless they somehow electrify Kevin and get the rest of his brain cells working.
Stay for the (the dance sequence is amusing)...and definitely say for the Marvel-esque post-credits scene.
Verdict: I recommend the living daylights out of this movie, and I will be seeing this again. I would even be willing to pay full price for it, it was that good.