I can't say it turned out good (because lots of folks would disagree with that claim), but for me, I thought
G.I. Joe would make for a good time at the movies just to be able to mock it for its stupidity, but I laughed at myself walking out the theater because I really liked it.
I'd also say the first
Cars. I avoided it like the plague, but ended up really liking it when I saw it on BD. I also like
The Change-Up. I just knew I would hate that one, but to my surprise...nope. Same goes for
Chronicle and
Crank (the first one). Lastly,
Water Horse and
The Expendables also come to mind.
As you can see, I have a few.
Good question.