Hi, I recently practiced making rolls and buns with success, before all I could get consistent was french bread and pizza dough. I learned from experimenting that for rolls its better to have a dough that is wet and sticky, so a little more liquid or less flour helps. Also I found that the rolls turned out softer when I let the dough rise 2 times (at least an hour each) before shaping and final rise rather than just once as some bread recipes call for.
The less you work the dough when forming the lighter the rolls will be too.