I understand that 
"Meter System",like those in KOTOR series, is too general as suggested 
While "Individual System" is too complex for both players and designers 
So we do need a system which is both not so general but also not too complex 
My idea is that 
Why not use multiple meters system? 
I know DnD has used it for long 
but I'm not going to say the old Good/Evil and Chaotic/Lawful 
We should make it more modern-styled 
For example,a cold-war-styled Tri-meter: 
Communist/Capitalist 
Good/Evil(I must admit it is old-fashioned) 
Famous/Infamous(also old-fashioned but  
unlike most games, you can be infamous in time, for example 
you are a famous communist hero who fights the tyrannical capitalist government, 
but one day you are caught and sent to a secret lab as a sample of a super soldier project 
after many operations, you remember that you are the guardian of the working class, 
you breach out the lab with your newly gained power, 
However, most men do not recognize you as long time passed or 
 the working class is  having such a hard time that they can't spend time to cry for and remember you 
the result is that you are not famous now) 
Famous is also special that it works as a "effectiveness meter" for the other two meters 
Although "fame meter" will make some fractions hostile to you, it brings you benefits from friendly fractions 
Another idea is that  
Even generally the three bars are parallel 
They may work in two or three on some statements 
Hippies welcome you if you are neither a famous commy or cappy or good guy or bad guy 
so if you are a neutral guy or a not so famous one of any fractions, they will welcome you