I think I'm going to scream the next time someone brings up the hoary old 'but there should have been more friction!
Don't worry, only the DS9ers are the ones wishing for more friction. But seriously VOY didn't have that edge which TOS or DS9 had.
Overall I would say VOY is a bit more better than TNG, due to a more consistent theme, however TNG had far more stand out episodes which were totally awesome. I always believe that VOY was what TNG should have been barring the screwed up continuity and multiple timelines and resets...