Voyager's senior officers are:
Captain Kathryn Janeway
Commander Chakotay
Lieutenant Commander Tuvok
Lieutenant B'Elanna Torres
Ensign (Lieutenant) Tom Paris
Lieutenant (Ensign) Harry Kim
The Emergency Medical Hologram "Doc"
and also important are:
Mr. Neelix
Seven of Nine
Naomi Wildman (Captain's Assistant)

People just assume that because the series isn't the first one they ever watched, it won't be as good Star Trek. When Deep Space Nine first came on, a lot of fans were skeptical because it was set on a space station and not a ship. But once they gave it a chance and let it develop, they loved it. All Star Trek series have different personalities. Otherwise, they wouldn't be as interesting.