I found Cloverfield entertaining. But then clearly our tastes differ based on your even having gone to see the X-Files movie.
Friend dragged me to it. I agreed to go solely because I'd heard about Scully injecting a syringe of goo labeled "stem cells" into a kid's brain. I was disappointed that there wasn't actually a label, but overall the sequence did not disappoint. It was hilarious. Also funny are Mulder's quips about child molestation.
I highly recommend that if by some freak occurrence you do wind up seeing it, make sure you're surrounded by die-hard X-Files fans. They're just as entertaining as the movie when they try to pretend it's halfway decent.