This is perhaps a rather minor thing but occurs frequently enough for me to make an idea to eventually get it changed.
So, when you have a section view active in an assembly and place a new component in it, the newly placed component very often ends up on the non-visible side of the section plane. It forces me to either undo the placement and do it again with more care (turning the model before placing it), or delete the section plane, move the component (by adding constraints), and then turn on the section view again.
The idea would be that inventor checks if the part being placed is about to go end up on the wrong side of the section plane and if so, moves it to the closest point where it's still at least partly visible, i.e. on the active section plane. It would save me from at least some unnecessary hassle.