I've been playing with this since reading this thread.. It's kinda fun. As has been said, it never sounds bad as such, it just sounds unresolved. If the note could talk, it would screaming "don't leave me hanging bro!". One more note makes it sounds intentional and kinda cool... to a degree 
Jim Stinnett has some great videos on soloing and he often shows great examples of this in action
Jim Stinnett has some great videos on soloing and he often shows great examples of this in action