Isn't this like handing someone a bowl of red M&Ms and asking her to pick out the reddest one?
"Mediocre" is Voyager
in a nutshell. It was never as terribad as TNG, DS9, or ENT could be (even "Threshold" wasn't as bad as some of the boners from the other shows), but it also never achieved greatness. "Year of Hell" came close, but it was spoiled by the reset.
It was like the show was just content with what it was and never really tried to push the envelope but, at the same time, remained safe.
Season Five was probably when the show was most modest and humble, so "Night" is as good an answer as any.