A pretty girl is more attractive than a smart girl.
Agreement/Disagreement > In my opinion/personally, I feel/ I guess
A: In my opinion, a leader should be a male. B: ... Male and female have the same right. Female can also be a leader.
I don't think so... I don't think that's right... I disagree with you...
How do you see an ideal friend is?
In my opinion... Personally, I think... If you ask me...