As mentioned before, the aperture can change the feel of a photo entirely.
This can be a bad thing if it isn't intentional.
For starters, product or lifestyle product photos do not look good with a ton of bokeh. I don't care which way you twist or try to look at it... You're taking pictures of products. These photos should represent the product 100%.
Soft edges and background take away from the product altogether. If you haven't noticed, 95% of all professional product photos are taken and edited very sharp, natural, and not over-exaggerated.
The same can be said about most male portraits. Even more so for the ones who are going for the 'edgy' or 'hard' look. Bokeh would completely change the feel of these photos.
Think about the feeling you want to give your viewers before setting your aperture in these cases.