It doesn't necessarily make them nice either.

I have opinion x

Fred has opinion y.

So far so hoopy. No arguments over whose round it is next.

My opinion has no detrimental effect on others.

Fred's opinion needs losers to gain his winners.

Whose round is it?

My opinion is free of ideology.

Fred can't unshackle his opinion from what he was brought up thinking.

I'll buy the beers because poor old Fred is deluded.

My opinion isn't perfect, has a few holes in it but I'm comfortable with it.

Fred states that he could say the same about his.

Fred's round.

My opinion is based on weighing up the evidence and I say so.

Fred resorts to lies and distortions to bring people round to his view.

Time to glass the bastard.