Ich finde, dass...
I think that...
Everyday opinion starter
Meiner Meinung nach...
In my opinion...
Slightly more formal
Das sehe ich anders.
I see it differently.
Disagreeing politely
Da hast du recht.
You're right about that.
Agreeing
Das stimmt nicht ganz.
That's not quite right.
Mild disagreement
Der Grund dafür ist...
The reason for that is...
Giving a reason
...weil ich keine Zeit habe.
...because I don't have time.
Reason with weil
Einerseits..., andererseits...
On one hand..., on the other hand...
Comparing viewpoints
Ich stimme dir voll zu.
I fully agree with you.
Strong agreement