Sometimes I wonder if I'm the only person in the world with a preference for 3-character width tabs.
I also wonder if I can ever bring up this topic in public without being called perverse by other programmers. People get really weirdly religious about this.
What language are you using where 3-spaces-wide tabs are more comfortable?
I do suspect that Fitt's Law[0] applies to the question of ideal indentation width though. In that case there is a trade-off between trying to minimize the number of characters for less distance, since that makes it easier to "hit the target" with your reading saccade, and having enough distance to make sure indentation has a visually distinct gap from plain spaces. However, the sweet spot of that trade-off is undoubtedly very personal and dependent on many factors.