That's funny because I'm mostly apathetic about Sam/Jack, but Lee/Laura annoys me. Granted, it's more of a squick issue than anything else, but Sam and Jack have a pretty big age gap between them too, so I don't know if that explains it. I guess it's just that Sam and Jack seem to have a relationship more like equals despite Jack being her commanding office, whereas Roslin has a lot more power than Lee, and it seems to me like she relates to him less as a friend and more as a subordinate (but this is, of course, subject to interpretation).