I'd say they're both important. Yes, you want consistency within the UX. Of course. But the users' expectations are set by their cumulative (read: across all a

I'd say they're both important. Yes, you want consistency within the UX. Of course. But the users' expectations are set by their cumulative (read: across all apps) broader experience. If a high percentage of your users have a certain expectation for Interaction X and the app is not that (tho' consistent within the application) those users will likely be disappointed. Of course some components + UX are truly unique. Perhaps the crux of your killer app / killer feature. Unfortunately, this is not as often as most ppl think; thus too much time is wasted making unique those things which are better off frictionless and forgettable.