There are a variety of insulation types that can be used around your home and selecting the right one for the job you are working on can be a little confusing.
For most jobs you will probably want to stick with fiberglass insulation. Whether in batt form or loose fill it gives a decent R-Value per square inch and with proper precautions working with it can be quick, easy and clean.
This does not mean that fiberglass should be the only choice …