I don't think there's anything wrong with not wanting to promote material you don't personally find interesting.

Granted, as it is a business you do want to maximize earning potential and it very well may be the case that the material that has the potential to earn you the greatest revenues is stuff you don't find interesting in the least.

But at the same time, it can't hurt to promote stuff you have a personal interest in because that personal interest, familiarity with and awareness of the content will come across in the manner in which you promote it and the enthusiasm and energy you put in to it, be apparent to your surfers, and do well for you revenue-wise.