Without calibrating your monitor, you will always at best have an uncertain output. That's just the way it is. Even then, different monitors have different characteristics, but at least calibrating them can get them close to a "standard".
But, like you say, your prints can come out nicely. If they please you and others, well, that's what's important. Getting them to exactly match your monitor can be important for some types of photography, not so much for others. It does cost money to get a monitor that will "cooperate" and a calibrating system that will work well. it's up to you whether it's worth the expense.
One thing I don't see often addressed. When calibrating monitors, do the devices come with software to control what the video card outputs? Reason I ask - my monitor has no adjustment other than brightness on the actual monitor.


