I think there are two major categories of opinions.

Passive opinions, and imposing opinions.

Passive opinions are personal opinions that don't truly affect other people.

Imposing opinions are opinions that people attempt to impose on other people.

I find passive opinions interesting.

I find imposing opinions annoying.

There can also be a fine line between the two.

After all, if a person who has an imposing opinion is attempting to impose that opinion onto a person who holds a passive opinion it can often be difficult to tell which is which.

Although, it can often be determined with close examination.

For example supposed there are two couples. One comple is heterosexual, the other couple is homosexual. If they both hold passive opinions about whether relationships should be heterosexual or homosexual then these couples can live side-by-side in harmony with no problems.

However, if one couple feels that their sexual preferences should be absolute and apply to all couples, then clearly there's going to be problems. Yet it only take ONE couple to hold this imposing opinion to destroy the harmony of the society as a whole.

The other couple will then always be on the "defense" trying to justify their passive opinion that every couple should decide their own sexual orientations. That's a passive stance. They are actually suggesting here that all opinions should be passive (i.e. apply only to the people who hold them).

The problems that arise from opinions stems from people who attempt to impose their opinions onto others.

That's when opinions become problematic. It's actually the act of imposition that's problematic.

Some people are out to share their opinions for anyone who might be interested.

Other people are out to impose their opinions on others whether they might be interested or not.