'That' implies a little stronger emotion than 'it'.

[Winwin2011]

That and it can both refer to what has been just mentioned. A native speaker said : If you use the word 'that', it simply implies a little stronger emotion than if you were to use the word 'it.

Could you please further explain to me?

Your help is much appreciated.

Happy New Year to all of you!

[konungursvia]

It's possible. "That" is a demonstrative, which is like pointing at something with your finger while talking about it. Pointing may seem more emotionally demonstrative than just mentioning, so the assertion may be true:

"It's a lovely photo."
"That's a lovely photo."

Yes, the second sounds more expressive.

[Winwin2011]

It's possible. "That" is a demonstrative, which is like pointing at something with your finger while talking about it. Pointing may seem more emotionally demonstrative than just mentioning, so the assertion may be true:

"It's a lovely photo."
"That's a lovely photo."

Yes, the second sounds more expressive.

Many thanks to konungursvia

I'd like to know if there's any slight difference if we use "I don't want to talk about that' instead of the following:

I don't want to talk about it Rod Steward

I can tell by your eyes
That you've probably been crying forever
And the stars in the sky don't mean nothing
To you they're a mirror

*I don't wanna talk about it
How you broke my heart
If I stay here just a little bit longer
If I stay here
Won't you listen to my heart, oh, my heart

If I stand all alone
Will the shadows hide the color of my heart?
Blue for the tears, black for the night's fears
The stars in the sky don't mean nothing
To you they're a mirror(*)


Thanks again!

[Raymott]

Many thanks to konungursvia

I'd like to know if there's any slight difference if we use "I don't want to talk about that' instead of the following:

I don't want to talk about it Rod Steward

[...]
*I don't wanna talk about it
How you broke my heart
If I stay here just a little bit longer
If I stay here
Won't you listen to my heart, oh, my heart

If Mr Stewart's priority was getting the grammar right, he would have written, "I don't want to talk about how you broke my heart." Neither 'it' nor 'that' is correct.
However, the usual thing to say when you don't want to talk about something generally is "I don't want to talk about it" -- unless there is something specific which you wish to avoid discussing. In this case, he says he doesn't want to talk about it, before giving, as an afterthought, the thing he doesn't want to talk about. He could have used "that", but then that/it would have been a different song.