I have two contributions two this thread, and funnily enough, both involved my girlfriend - says alot about her taste.
1) Her, her friend and I were going to the cinemas, and they had bought the tickets before hand, which at the time I thought were tickets to Into the Wild (I think?). So the opening credits start rolling, they start giggling like the bumbling idiots they are, and I being a naive fool suspected nothing. Then about three minutes later they told me to check the ticket, to which I realised it was P.S. I Love You. Now I'll admit, I'm not a big fan of chick flicks, but the movie was so horrendous I think my brain was confused to what emotional reaction I was to have to it. The chemistry between the leads was non-existent and it was horribly cliched. So the joke wasn't just on me, but my two friends and everyone in the audience.
2) She tells me of how she wants to see the remake of some film featuring Sandra Bullock as the lead. Now all warning signals went off when I heard this, but stupidly I paid the $3 to borrow it to watch it with her the next day. Premonition has to be one of the worst films I have ever seen. The fact that the movie is high budget with some reasonably large stars makes it worse - they actually tried!. I seriously picked the ending about 20 minutes into the film, and was utterly confused by the lack of continuity with the time skips - sooo many mistakes there. Anyway, yeah. It sucked ass.
Sorry about the overkill there, but I feel very strongely about the terribleness of these films. Plus I was bored.
Don't watch them, don't even touch the cover of the DVD/VHS.