I hate to disagree with you, but your opinion is too subjective.
我不想跟你有不同意見,但是你的觀點太主觀了。
I hate to disagree with you, but I think you view is impractical.
我不想跟你有不同意見,但是我認為你的觀點不切合實際。
I hate to disagree with you, but I think diligence is more important than talent.
我不想跟你有不同意見,但是我認為勤奮比天賦更為重要。