Don't take this personally = 我就是针对你;
With all due respect = “我想骂你可是你还没喷脏字”或者”你辈分职位比我高啊,可是还是想骂你”;
I don't mean to be rude = 你生气我也不介意;
If you don't mind me / allow me to/ may I suggest an alternative = 你的想法弱炸了,来听听我的
Correct me if I’m wrong but… =我知道我没错…;
Are you sure you want to be doing that?=你做错,我会告诉你正确的方式;
I’m not being snobby, but…=我就要势利了起来了;
I’m not about to tell you what you should be doing with your life, but if I were you…=你做的不对,我来告诉你该怎么做。
If I were in your shoes,......
As much as I want to agree...
Apologies if my opinions offend you...
……