I've read so much bad about the movie that I am unwilling to give it the benefit of the doubt. And like yourself I don't really have much interest in a romantic comedy genre. I rent out a romantic comedy if there isn't really anything else interesting in the video store that I haven't seen yet. I'd watch Gigli (or at least acknowledge its existence, if it was on T.V. I would probably pause while channel surfing and give it half my attention for 30 seconds, then try to find something interesting like that quasi-reality show about Scott Baio or CNN. I'd watch Gigli it if I was stuck in an airport waiting lounge waiting for a connecting flight.
I tend to agree with you though that one should give a movie the benefit of the doubt. And I think if you decide to review a movie you should actually see it. In saying that though I realize that I contradict myself because I've pretty much made up my mind based on anything I've read heard or seen about Gigli that it sucks majorly. Every sane movie critic in the universe has panned it. Meet the Spartans is on at the local theatre. I'm not gonna dish over my hard-earned salary to see it because I've heard it is extremely bad. So I'm judging that movie before I've ever seen it.