For me, I tend to go more to the romance tag as opposed to the UST unless there's something more...'explicit' going on short of actually physical contact that is more than kissing.

*Whew I didn't know I could tap-dance that well. :P

I do read Jack/Sam and I occasionally read slash if it's recommended as having a good story. Slash without a good story base is smut and I detest smut. I'm not a fan of porn in any form, however I do read some stories that are sexually explicit because they fit with the story.