How do I make a good 2hr Animation Movie fun even though there won't be Fancy Camera work?

HI guys.

I’m making a movie. I made a descent story that i think is fun and the story is driven by action and conversation( subtitles because dont have voice actors or i might do it myself but i suck at speaking), but it will mostly be BG pics and the characters on top of that. So there
won’t be alot of camera animation.

Can a movie still be fun even without any camera movement?
Some people say 3D needs camera movement to look realistic.

Reason i won’t do too much camera anim, is cause i would have to render a lot and it would take long time. I dont really care about fancy camera work cause i think the story is most important, so i’m just doing bg pics