Stats and SEO stuff aside, if you have barely any dislikes at all it means either
1.) Not that many people saw your stuff
2.) Practically only your dedicated fanbase watches your stuff
3.) Nothing you say is personal or that opinion-based, and doesn't incite anybody to think enough to disagree with something (and there's people on the 'net eager to disagree with anything). In other words, the content is intellectually bland.
This applies at large numbers though. Like say when you have 1k likes to 1 dislike. I feel like a healthy video that actually promotes some form of interesting discussion (which isn't simply preaching to the choir, hence #2 up there) should have dislikes at least around 2 to 3%, if not more.