When you first get M3 (or V3) and are faced with Injection, I recommend just creating a figure with all morphs installed (if your system can handle it) and do a lot of experimenting. It won't take you long to figure out which morphs you will use frequently and which rarely. Then you can create your own "base figure" with just the morphs you like. The lighter version will make file sizes much smaller, speed up rendering, and make Poser previews update faster not to mention the fact that you will not have to scroll through long lists to find the morph you want, so it is a very good system once you are familiar with the morphs themselves.