People who say they don't care about being liked are full of it. Everyone wants to be liked. If you want to be the most well-liked brother (or the most popular brother) in your fraternity then follow this rule:
Don't talk bad about a brother - EVER.
If you can follow this rule, then your brothers will hold you in high regard. They will look at you as a man of character who has the integrity not to talk bad about someone behind their back. You will be seen as above the pettiness that grips a lot of chapters. You will seen as a positive leader in your chapter.
More importantly, this is a good trait to carry on through life. There are going to be a lot of people and situations you disagree with. Complaining about it will never get you anywhere. Taking the high road will.
If you doubt me, try it for a week and see if you notice a difference. I am sure you will.
The Fraternity Advisor tips